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Warhammer Base Sizes Guide | 40K, AoS, Old World & Kill Team Chart

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Last updated: October 14, 2026. What changed: added the new Ork base sizes from the 11th Edition Codex: Orks (Warboss and Weirdboy now on 50mm), filled in the Armageddon box characters and vehicles, added a most-searched units table and inch equivalents, and corrected the Imperial Knight oval (170x109mm), Space Marine Captain (40mm), several monster sizes and a handful of Age of Sigmar and Kill Team examples. The free print reference card is updated to match. Always check the latest FAQ or tournament companion for your edition.

Every Warhammer base size for every unit, in one chart. Covers 40K (10th & 11th Edition), Age of Sigmar, The Old World, and Kill Team — with quick-reference tables and unit examples for each.

Getting the right base size matters. Tournament organizers enforce base sizes because they affect movement distances, model spacing, and line of sight. Even in casual games, using the correct base keeps the game fair and your army looking sharp.

This guide covers base sizes for Warhammer 40,000, Age of Sigmar, Warhammer: The Old World, and Kill Team. Each section includes quick-reference charts so you can find what you need fast.

LITKO manufactures precision laser-cut miniature bases in every standard Warhammer size—round, oval, square, and rectangular—in clear acrylic, plywood, and with magnetic bottoms. If you need a size we don't stock, the LITKO BaseMaker tool lets you order custom dimensions.

At a Glance

The Most-Searched Warhammer Base Sizes

In Warhammer 40,000, Space Marines use 32mm round bases, Terminators use 40mm round, and Imperial Knights use 170x109mm oval bases. The full charts for every unit across 40K, Age of Sigmar, The Old World, and Kill Team are below.

  • Space Marines (Firstborn & Primaris): 32mm round
  • Necron Warriors: 32mm round (25mm on older boxes)
  • Terminators: 40mm round
  • Light xenos infantry (Eldar Guardians, Termagants): 28.5mm round
  • Light infantry (Guardsmen, Gretchin): 25mm round
  • Dreadnoughts: 60mm round (Redemptor/Primaris: 90mm)
  • Primaris Outriders / Captain on Bike: 90x52mm oval
  • Imperial Knights (Questoris): 170x109mm oval
  • Riptide / Wraithknight: 120x92mm oval

Most-Searched Units — Base Size Lookup

The individual units people ask about most, with the base each one ships on today:

Unit Base Size Shop at LITKO
Space Marine Captain (power armour, Gravis, Phobos, Jump Pack) 40mm Round
Captain in Terminator Armour 50mm Round (kit; the 11th Ed. datasheet lists 40mm)
Terminator Squad 40mm Round
Redemptor Dreadnought 90mm Round
Leviathan Dreadnought 80mm Round
Lion El’Jonson 60mm Round
Battle Sisters 32mm Round
Cadian Shock Troops 25mm Round
Ogryn 40mm Round
Necron Warriors 32mm Round
Hormagaunts 28.5mm Round
Fire Warriors (Strike / Breacher Team) 25mm Round
Chaos Bikers 75x42mm Oval
Ork Boyz 32mm Round (Nob 40mm)
Ork Warboss 50mm Round
Gretchin 25mm Round
Deff Dread 60mm Round
Big Mek Dakkarig 90mm Round

Warhammer 40K 11th Edition — Will I Need to Rebase?

Warhammer 40,000 11th Edition released on June 20, 2026, alongside the Armageddon launch box. The question that came with it: do my bases still work?

Short answer: yes. Games Workshop has not changed the standard round and oval sizes for 11th Edition, and a faction still waiting on its 11th Edition codex uses its 10th Edition codex rules until that book arrives. The exception is new kits: some ship on a bigger base than the model they replace. The Ork Warboss and Weirdboy moved from 40mm to 50mm with the 11th Edition Codex: Orks, and the Space Marine Captain and Chaplain with Jump Pack are on 40mm. The charts on this page show the current base for each unit.

The standard 25mm / 32mm / 40mm round bases that anchor most current 40K units have been the GW standard for nearly a decade and are extremely unlikely to change. Larger walker, monster, and Knight bases are similarly stable. If you are starting a new army or rebasing now, you are not at risk of doing it twice; just match the base that ships with each new kit.

Standard sizes are unchanged: Games Workshop has not changed the standard round and oval sizes for 11th Edition. Some new kits ship on different bases than their older versions (see the Orks note below). We update this guide as new codexes and kits land.

Setting up an 11th Edition table? Bases are only half of it. Our Warhammer 40K Token Guide covers the status, movement, and objective tokens the edition asks for—Hidden, Battle-shock, terrain objectives, modifiers, and more. And our Warhammer 40K Terrain Footprints (11th Ed.) guide gives the exact ruins, crater, and objective footprint sizes for setting up an 11th-edition table.

Armageddon Launch Box — Base Sizes for the New Models

Building the 11th Edition Armageddon launch box (Space Marines vs Orks)? Every model inside uses a standard Games Workshop base size — here’s the quick breakdown:

Armageddon box models by base size
Base Size Armageddon Box Models Shop at LITKO
25mm Round Gretchin, Grot Orderly
32mm Round Intercessors, Vanguard Veterans, Ork Boyz, Painboy
40mm Round Captain, Librarian, Chaplain with Jump Pack, Ancient, Eradicators, Bigboss, Bannernob, Boyz Nob
50mm Round Warboss, Weirdboy
90mm Round Big Mek Dakkarig
105x70mm Oval Land Speeder, Wartrakk

Ork base sizes changed with the 11th Edition Codex: Orks (September 2026). The Warboss and Weirdboy now use 50mm bases (previously 40mm), and the Nob that leads a Boyz mob uses 40mm. The core 25/32/40mm sizes are unchanged. See the full Ork base size chart below.

Warhammer 40K Base Sizes — Quick Reference Chart

Warhammer 40,000 uses round and oval bases. The chart below lists every standard base size (with its inch equivalent), what types of units use it, and some common examples. If your model came with a base in the box, that is the correct size to use.

Base Size Unit Type Example Units Shop at LITKO
25mm Round
(0.98″)
Light Infantry, Guardsmen Cadian Shock Troops, Gretchin, Poxwalkers, Kabalite Warriors, Fire Warriors
28.5mm Round
(1.12″)
Light Xenos Infantry Guardian Defenders, Dire Avengers, Termagants, Hormagaunts, Flayed Ones
32mm Round
(1.26″)
Power Armour Infantry, Elite Infantry Space Marines (all Firstborn & Primaris), Necron Warriors, Sisters of Battle, Chaos Marines, Ork Boyz, Genestealers
40mm Round
(1.57″)
Terminators, Large Infantry, Characters Terminators, Custodian Guard, Ogryn, Zoanthropes, Wraithguard, Space Marine Captains
50mm Round
(1.97″)
Heavy Infantry, Centurions, Characters Centurions, Terminator Captains, Obliterators, Chaos Spawn, Hive Guard, Ork Warboss & Weirdboy
60mm Round
(2.36″)
Dreadnoughts, Small Monsters Dreadnoughts, Helbrutes, Daemon Prince, Wraithlord, Deff Dread
80mm Round
(3.15″)
Large Walkers, Named Characters Leviathan Dreadnought, Avatar of Khaine, Ghazghkull Thraka, C'tan Shard of the Void Dragon
90mm Round
(3.54″)
Heavy Walkers, Large Beasts Redemptor Dreadnought, Ballistus Dreadnought, Brutalis Dreadnought, Big Mek Dakkarig
100mm Round
(3.94″)
Small Knights, Heavy Vehicles Armiger Warglaives, Armiger Helverins, War Dogs, Repulsor, Greater Daemons
130mm Round
(5.12″)
Artillery, Large Monsters Onager Dunecrawler, Great Unclean One, Artillery platforms
160mm Round
(6.30″)
Super-Heavy Walkers Monolith, Ta'unar Supremacy Armour

Warhammer 40K Oval Base Sizes

Oval bases are used for bikes, cavalry, large walkers, flyers, and Knights. The dimensions are listed as width x length.

Base Size Unit Type Example Units Shop at LITKO
60x35mm Oval Cavalry, Mounted Characters Rough Riders, Serberys Raiders, Flesh Hounds, Atalan Jackals
75x42mm Oval Bikes Chaos Bikers, Ork Warbikers, Deffkoptas, Vertus Praetors (Custodian jetbikes)
90x52mm Oval Large Bikes, Mounted Units Primaris Outriders, Captain on Bike, Hernkyn Pioneers, Daemon-mounted Characters
105x70mm Oval Large Walkers Ironstrider Ballistarius, Ghostkeel Battlesuit, Belisarius Cawl, Carnifex, Land Speeder, Ork Wartrakk
120x92mm Oval Flyers, Large Monsters Wraithknight, Riptide, Nemesis Dreadknight, Trygon, Bloodthirster, Valkyrie, Forgefiend
170x109mm Oval Knights, Super-Heavy Walkers Imperial Knights (Questoris class), Chaos Knights, Gorkanaut, Morkanaut, Stormsurge
150x95mm Oval Buggies, Trikes Ork Warbuggies, Rukkatrukk Squigbuggies, Deffkilla Wartrike

Note on vehicles: Many Imperial Guard tanks (Leman Russ, Baneblade, etc.) and some other large vehicles do not use bases at all—they sit directly on their hull. If your model came without a base, it does not need one.

Warhammer 40K — Base Sizes by Unit Type

Below is a more detailed breakdown organized by the type of unit, which makes it easier to figure out what base an older or secondhand model needs.

Infantry

Category Base Size Examples
Light Infantry / Auxilia 25mm Round Cadian Shock Troops, Gretchin, Poxwalkers, Skitarii Rangers, Neurogaunts
Light Xenos Infantry 28.5mm Round Guardian Defenders, Dire Avengers, Termagants, Hormagaunts, Dark Reapers, Flayed Ones, Kroot Carnivores
Power Armour Infantry 32mm Round All Space Marines (Firstborn & Primaris), Chaos Space Marines, Sisters of Battle, Rubric Marines, Plague Marines
Terminators & Heavy Elite 40mm Round Terminators (all types), Custodian Guard, Ogryn, Mega-Armoured Nobz, Wraithguard
Heavy Weapons / Centurions 50mm Round Centurion Assault/Devastator Squads, Obliterators, Hive Guard, Terminator Captains

Characters & HQs

Character base sizes match their armour type. A Captain in power armour (including Gravis, Phobos and Jump Pack Captains) uses a 40mm base. A Captain in Terminator armour comes on a 50mm base in the current plastic kit (older resin Captains came on 40mm, and the 11th Edition datasheet also lists 40mm, so check your event pack if base size matters). Named characters with large models (Guilliman, Ghazghkull, Magnus) use 60mm–100mm bases matching whatever came in the box.

Walkers & Dreadnoughts

Walker Type Base Size Examples
Standard Dreadnoughts 60mm Round Venerable Dreadnought, Contemptor, Helbrute, Deff Dread, Wraithlord
Heavy Dreadnoughts 80mm Round Leviathan Dreadnought, Deredeo Dreadnought
Primaris Dreadnoughts 90mm Round Redemptor, Brutalis, Ballistus Dreadnoughts
Small Knights / Armigers 100mm Round Armiger Warglaive, Armiger Helverin, War Dogs, Magnus the Red, Mortarion
Dreadknights / Large Walkers 120x92mm Oval Riptide, Wraithknight, Nemesis Dreadknight
Full-Size Knights 170x109mm Oval Imperial Knight (Questoris), Chaos Knight, Gorkanaut, Morkanaut, Stormsurge

Monsters & Creatures

Size Category Base Size Examples
Small Monsters 60mm Round Hive Tyrant (walking), Daemon Prince, Talos, War Walker
Medium Monsters 80mm Round Avatar of Khaine, C'tan Shard of the Void Dragon, Ghazghkull Thraka
Large Monsters 100mm Round Greater Daemons (Keeper of Secrets, Lord of Change), Daemon Primarchs (Magnus the Red, Mortarion), Armiger Knights
Huge Monsters 120x92mm Oval Bloodthirster, Wraithknight, Forgefiend, Exocrine, Haruspex, Toxicrene
Titanic 130mm–160mm Round Great Unclean One, Monolith, Ta'unar

* Some Greater Daemons have been repackaged with different base sizes across editions. Check which base came in your box.

Ork Base Sizes (11th Edition)

The 11th Edition Codex: Orks (September 2026) brought new kits and a few bigger bases: the Warboss and Weirdboy moved from 40mm to 50mm, and the Nob leading a Boyz mob is on 40mm. Here is every current Ork base size:

Base Size Ork Units Shop at LITKO
25mm Round Gretchin, Grot Orderly
32mm Round Ork Boyz (the mob’s Nob uses 40mm), Painboy, Mek, Kommandos, Stormboyz, Burna Boyz, Lootas
40mm Round Bigboss, Bannernob, Boyz Nob, Nobz*, Meganobz, Flash Gitz, Boss Snikrot
50mm Round Warboss, Weirdboy, Big Mek, Beastboss, Zodgrod Wortsnagga
60mm Round Nazdreg, Deff Dread, Killa Kans
80mm Round Ghazghkull Thraka, Mozrog Skragbad
90mm Round Big Mek Dakkarig
75x42mm Oval Warbikers, Deffkoptas, Squighog Boyz (Nob on Smasha Squig: 90x52mm)
105x70mm Oval Wartrakk
150x95mm Oval Warbuggies, Squigbuggies, Deffkilla Wartrike
170x109mm Oval Gorkanaut, Morkanaut, Hunta Rig, Kill Rig
No base Trukk, Battlewagon, Stompa

* Nobz are listed on 40mm per the 11th Edition datasheet; the new Nobz kit has not shipped yet, so check the base in the box.

Browse All Warhammer-Compatible Bases →

Age of Sigmar Base Sizes

Age of Sigmar uses the same round and oval bases as Warhammer 40K. Many base sizes overlap, especially for Chaos Daemons that cross between both game systems. The correct base is whatever came in the model's box. For the full faction-by-faction 4th Edition chart, see our Age of Sigmar Base Sizes Guide.

Base Size Unit Type Example Units Shop at LITKO
25mm Round Basic Battleline, Hordes Clanrats, Deathrattle Skeletons, Moonclan Stabbas, Skinks, basic Grots
32mm Round Elite Infantry, Heroes Blood Warriors, Namarti Thralls, Hearthguard Berzerkers, Saurus Warriors
40mm Round Heavy Infantry, Characters Stormcast Vindictors, Liberators, Skullreapers, Ironguts, Retributors, Blightkings
50mm Round Monstrous Infantry, Cavalry Crypt Horrors, Kurnoth Hunters, Vargheists
60mm Round Large Characters, Cavalry Heroes Varghulf Courtier, Dankhold Troggboss, Plague Drones
75x42mm Oval Cavalry, Mounted Heroes Chaos Knights (cavalry), Blood Knights, Freeguild Cavalier-Marshal
90x52mm Oval Large Cavalry, Small Monsters Mournfang Pack, Dracothian Guard, Bloodcrushers
100mm+ Round Large Monsters, Behemoths Mega-Gargant, Archaon, Nagash, Alarielle, Gordrakk
120x92mm Oval Centrepiece Monsters Bloodthirster, Terrorgheist, Zombie Dragon, Stonehorn, Thundertusk, Greater Daemons

Tip for AoS players: Games Workshop publishes an official base sizes PDF that is updated with each Battlescroll FAQ. If you are rebasing older models or preparing for a tournament, download the latest version from the Warhammer Community site.

Warhammer: The Old World Base Sizes

The Old World returns to square and rectangular bases for rank-and-file combat. This is the biggest difference from 40K and AoS. Straight edges allow models to rank up in tight formations, which is central to the gameplay.

Games Workshop updated many base sizes when The Old World launched. The old 20mm infantry bases are gone—the minimum is now 25mm square. Heavy and knight cavalry moved up to 30x60mm, but lighter, faster mounts (warhounds, wolf riders, skeleton light horse) still use 25x50mm. If you are bringing back an older Warhammer Fantasy army, you may need to rebase or use base adapter trays.

Base Size Shape Unit Type Example Units Shop at LITKO
25x25mm Square Standard Infantry Empire State Troops, Skeleton Warriors, Goblin Regiments, Elven Spearmen, Dwarf Warriors
30x30mm Square Heavy Infantry, Characters Chaos Warriors, Black Orcs, Saurus Warriors, Temple Guard
30x60mm Rectangular Heavy Cavalry & Knights Empire Knights, Chaos Knights, Bretonnian Knights, Black Knights, Blood Knights
25x50mm Rectangular Light & Fast Cavalry Wolf Riders, Warhounds, Dire Wolves, Skeleton Horsemen, Mounted Yeomen
40x40mm Square Monstrous Infantry Ogres, Trolls, Kroxigor, Minotaurs, Ushabti
50x50mm Square Monstrous Cavalry, Large Characters Monstrous Cavalry, Dwarven Shieldbearers, mounted characters on large steeds
50x100mm Rectangular Chariots All standard chariots (Tomb Kings, High Elf, Empire)
Large (varies) Square/Rect. Monsters, War Machines Dragons, Steam Tanks, Treemen—use the base provided with the model

Rebasing for The Old World? LITKO Has You Covered

If you have an older Warhammer Fantasy army on 20mm bases, you do not necessarily need to pry every model off its base. LITKO makes base adapter trays that let your 20mm-based models rank up on a 25mm grid—and similar adapters for heavy cavalry moving from 25x50mm up to 30x60mm. Check the Specialty Movement Trays collection.

LITKO also makes formation and lance movement trays for The Old World—our Old World Movement Trays & Rebasing Guide covers which tray fits each unit, when a tray lets you skip rebasing, and the exact tray footprints.

Kill Team Base Sizes

Kill Team uses the same round bases as Warhammer 40K. Most operatives are on small-to-medium bases. Operatives with a base of 50mm or less (or an oval of 60x35mm or less) can traverse under certain terrain features, which matters tactically.

Base Size Operative Type Example Kill Teams / Operatives Shop at LITKO
25mm Round Light Operatives Breachers, Pathfinders, Death Korps, basic trooper-type operatives
28.5mm Round Standard Operatives Kasrkin, Mandrakes, Corsairs, Astartes Scouts, Arbites, Hearthkyn Salvagers
32mm Round Power Armour Operatives Phobos Strike Team, Legionaries, Chaos Space Marines, Intercessors
40mm Round Heavy / Specialist Operatives Nightmare Hulks, Traitor Ogryn, Tempestus Turrets
50mm Round Large Operatives Genestealer Patriarch, Technomancer, large specialist models

Choosing a Base Material: Acrylic vs. Plywood vs. Magnetic

Your base material affects appearance, weight, and how you finish the model. Here is a quick comparison:

Material Best For Characteristics
Clear Acrylic Gaming mats, display, "invisible base" look Transparent, lets your terrain or mat show through. Clean, modern look. Available in 1.5mm and 3mm thickness.
Plywood Traditional basing, texture work, painting Easy to prime, paint, flock, and add texture. Warp-resistant microplywood in 0.8mm, 1.5mm, and 3mm. Closest to GW plastic bases in feel.
Magnetic / Flex Steel Transport, magnetized army cases LITKO offers peel-and-stick magnetic base bottoms and flexible steel bottoms that pair with magnetic sheets in your carry case.

All LITKO bases are precision laser-cut in the USA, which means consistent sizing across every base in your army—no warping, no variation. This matters when you are ranking up 50+ infantry on a movement tray.

Need a Custom Size? Use LITKO BaseMaker

Playing a game with non-standard base sizes? Converting a model that needs a unique footprint? The LITKO BaseMaker tool lets you specify any shape (circle, square, rectangle, oval), any size, and choose from over 25 colors of acrylic or plywood. Order packs of 10, 25, 50, or 100.

Build Custom Bases with BaseMaker →

New to custom bases? Our companion guide walks through how to get custom miniature bases made — what BaseMaker can produce, choosing a material, exact sizing, and ordering in volume tiers.

Frequently Asked Questions

Do base sizes matter in Warhammer?

Yes. Base sizes affect movement, pile-in distances, coherency, and how many models can fight in melee. In matched play and tournaments, using the correct base size is required. In casual games most opponents are flexible, but using the "right" base keeps things fair and avoids arguments.

What base size are Space Marines on?

All current Space Marines—both Firstborn and Primaris—use 32mm round bases. Older models may have been sold on 25mm bases, but 32mm is the current standard. Terminators use 40mm round bases.

What is the difference between 25mm and 28mm bases?

Games Workshop has been gradually upsizing infantry bases. The 28mm base (sometimes listed as 28.5mm) is used for many non-power-armour infantry like Eldar Guardians, Dire Avengers, and Termagants. Necron Warriors moved up to 32mm with their current kit (older boxes came on 25mm). The 25mm base is used for smaller models like Guardsmen and Gretchin. For practical purposes, the difference is about 3mm in diameter.

Can I use clear acrylic bases in tournaments?

Generally yes, as long as the base is the correct size. Most tournament organizers care about dimensions, not material. Clear bases from LITKO are precision-cut to match GW base sizes exactly. Check your specific tournament's rules pack to be sure.

Do I need to rebase my old Warhammer Fantasy army for The Old World?

If your models are on 20mm bases, they will need to move to 25mm. Heavy cavalry on 25x50mm moves up to 30x60mm, though light cavalry (warhounds, wolf riders) still uses 25x50mm. You can either rebase (time-consuming) or use LITKO base adapter trays that let your old bases fit the new grid without removing models from their original bases.

Why are some bases oval instead of round?

Oval bases are used for models that are significantly longer than they are wide—bikes, cavalry, and some monsters. The oval shape better fits the model's footprint and helps with ranking coherency on the tabletop.

Will my bases still work in Warhammer 40K 11th Edition?

Yes. Warhammer 40,000 11th Edition released June 20, 2026, and Games Workshop has not changed the standard round and oval sizes. The standard 25mm / 32mm / 40mm round bases that anchor most current 40K units have been the GW standard for nearly a decade, and your existing 10th Edition army is tournament-legal on the same bases. Some new kits ship on bigger bases than the models they replace: the Ork Warboss and Weirdboy now use 50mm (previously 40mm). We update this guide as new codexes and kits land—see the 11th Edition section above for the latest.

Related Guides

Disclaimer: LITKO Game Accessories is an independent manufacturer of gaming bases and accessories. LITKO is not affiliated with, endorsed by, or sponsored by Games Workshop. Warhammer, Warhammer 40,000, Age of Sigmar, The Old World, Kill Team, and all associated names and imagery are trademarks or registered trademarks of Games Workshop Ltd.

Base sizes listed in this guide are based on publicly available information and community resources as of the date shown above. Games Workshop may update base sizes with new edition releases, FAQs, or product redesigns. Always refer to the model's packaging or the latest official FAQ for definitive base sizes.

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