Last updated: June 4, 2026. Base sizes reflect current Games Workshop guidelines. Warhammer 40,000 11th Edition goes up for pre-order June 6 and releases June 20, 2026 — no base-size changes announced; see the section below for the rebase question. 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.
The Most-Searched Warhammer Base Sizes
In Warhammer 40,000, Space Marines use 32mm round bases, Terminators use 40mm round, and Imperial Knights use 170x105mm 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): 28mm round
- Light infantry (Guardsmen, Gretchin): 25mm round
- Dreadnoughts: 60mm round (Redemptor/Primaris: 90mm)
- Space Marine Bikes: 75x42mm oval
- Imperial Knights (Questoris): 170x105mm oval
- Riptide / Wraithknight: 120x92mm oval
- Will My Bases Work in 40K 11th Edition? (June 2026)
- Warhammer 40K Quick Reference Chart
- Warhammer 40K — Base Sizes by Unit Type
- Age of Sigmar — Base Sizes by Unit Type
- Warhammer: The Old World — Square & Rectangular Bases
- Kill Team — Operative Base Sizes
- Choosing a Base Material: Acrylic vs. Plywood vs. Magnetic
- Need a Custom Size? Use LITKO BaseMaker
Warhammer 40K 11th Edition (June 2026) — Will I Need to Rebase?
Games Workshop announced Warhammer 40,000 11th Edition at AdeptiCon 2026. The Armageddon launch box goes up for pre-order on June 6 and hits stores on June 20, 2026. The first question most players are asking: do my bases still work?
Short answer: yes. As of the June 2026 launch, no base-size changes have been announced for 11th Edition. Your existing 10th Edition army is tournament-legal on the same bases — armies without an 11th Edition codex at launch simply use their 10th Edition codex rules in the meantime. Every chart on this page remains accurate for both editions.
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.
11th Edition update commitment: LITKO will update this guide within 48 hours of any official base-size announcement from Games Workshop. Bookmark this page or check back after the June launch for the latest confirmed base sizes for new units.
Gearing up for 11th Edition? Bases are only half the table. Our new Warhammer 40K Token Guide covers the status, movement, and objective tokens you'll want for the new edition—Hidden, Battle-shock, terrain objectives, modifiers, and more.
Warhammer 40K Base Sizes — Quick Reference Chart
Warhammer 40,000 uses round and oval bases. The chart below lists every standard base size, 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 | Light Infantry, Guardsmen | Cadian Shock Troops, Gretchin, Poxwalkers, Kabalite Warriors, Fire Warriors | Shop 25mm Bases |
| 28mm Round | Light Xenos Infantry | Guardian Defenders, Dire Avengers, Termagants, Hormagaunts, Flayed Ones | Shop 28mm Bases |
| 32mm Round | Power Armour Infantry, Elite Infantry | Space Marines (all Firstborn & Primaris), Necron Warriors, Sisters of Battle, Chaos Marines, Ork Boyz, Genestealers | Shop 32mm Bases |
| 40mm Round | Terminators, Large Infantry, Characters | Terminators, Custodian Guard, Ogryn, Zoanthropes, Wraithguard, Warboss | Shop 40mm Round Bases |
| 50mm Round | Heavy Infantry, Centurions, Characters | Centurions, Terminator Captains, Obliterators, Chaos Spawn, Hive Guard | Shop 50mm Round Bases |
| 60mm Round | Dreadnoughts, Small Monsters | Dreadnoughts, Helbrutes, Daemon Prince, Wraithlord, Carnifex, Deff Dread | Shop 60mm Round Bases |
| 80mm Round | Large Walkers, Named Characters | Leviathan Dreadnought, Avatar of Khaine, Ghazghkull Thraka, C'tan Shard of the Void Dragon | Shop 80mm Round Bases |
| 90mm Round | Heavy Walkers, Large Beasts | Redemptor Dreadnought, Ballistus Dreadnought, Brutalis Dreadnought | Custom 90mm via BaseMaker |
| 100mm Round | Small Knights, Heavy Vehicles | Armiger Warglaives, Armiger Helverins, War Dogs, Repulsor, Greater Daemons | Shop 100mm Bases |
| 130mm Round | Artillery, Large Monsters | Onager Dunecrawler, Greater Unclean One, Artillery platforms | Shop 130mm Bases |
| 160mm Round | Super-Heavy Walkers | Astraeus, Monolith, Ta'unar Supremacy Armour | Shop 160mm Bases |
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 | Custom Ovals via BaseMaker |
| 75x42mm Oval | Bikes | Space Marine Bikes (Firstborn & Primaris), Chaos Bikers, Warbikes, Custodian Jetbikes | Shop Bike Bases |
| 90x52mm Oval | Large Bikes, Mounted Units | Primaris Outriders, Hernkyn Pioneers, Daemon-mounted Characters | Shop 90x52mm Ovals |
| 105x70mm Oval | Large Walkers | Ironstrider Ballistarius, Ghostkeel Battlesuit, Belisarius Cawl | Shop Oval Bases |
| 120x92mm Oval | Flyers, Large Monsters | Wraithknight, Riptide, Bloodthirster, Valkyrie, Forgefiend | Shop 120x92mm Ovals |
| 170x105mm Oval | Knights, Super-Heavy Walkers | Imperial Knights (Questoris class), Chaos Knights, Gorkanaut, Stormsurge, Trygon | Shop Large Ovals |
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 | 28mm 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 uses a 32mm base. A Captain in Terminator armour uses a 40mm or 50mm base. 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, Nemesis Dreadknight, Magnus the Red, Mortarion |
| Dreadknights / Large Walkers | 120x92mm Oval | Riptide, Wraithknight |
| Full-Size Knights | 170x105mm Oval | Imperial Knight (Questoris), Chaos Knight, Gorkanaut, 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, Great Unclean One), Daemon Primarchs (Magnus the Red, Mortarion), Armiger Knights |
| Huge Monsters | 120x92mm Oval | Bloodthirster, Wraithknight, Forgefiend, Exocrine, Haruspex, Toxicrene, Carnifex |
| Titanic | 130mm–160mm Round | Greater Unclean One, Monolith, Ta'unar |
* Some Greater Daemons have been repackaged with different base sizes across editions. Check which base came in your 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.
| Base Size | Unit Type | Example Units | Shop at LITKO |
|---|---|---|---|
| 25mm Round | Basic Battleline, Hordes | Clanrats, Ungors, Deathrattle Skeletons, Namarti Thralls, basic Grots | Shop 25mm Bases |
| 32mm Round | Elite Infantry, Heroes | Stormcast Vindictors, Blood Warriors, Bestigors, Hearthguard Berzerkers, Stabbas | Shop 32mm Bases |
| 40mm Round | Heavy Infantry, Characters | Liberators, Skullreapers, Ironguts, Retributors, Blightkings | Shop 40mm Round Bases |
| 50mm Round | Monstrous Infantry, Cavalry | Mournfang Pack, Crypt Horrors, Kurnoth Hunters, Vargheists | Shop 50mm Round Bases |
| 60mm Round | Large Characters, Cavalry Heroes | Varghulf Courtier, Dankhold Troggboss, Frostheart Phoenix | Shop 60mm Round Bases |
| 75x42mm Oval | Cavalry, Mounted Heroes | Dracothian Guard, Chaos Knights (cavalry), Hexwraith/Black Knights | Shop Cavalry Bases |
| 90x52mm Oval | Large Cavalry, Small Monsters | Stonehorn, Thundertusk, Bloodcrushers | Shop Oval Bases |
| 100mm+ Round | Large Monsters, Behemoths | Mega-Gargant, Archaon, Nagash, Alarielle, Gordrakk | Shop Large Bases |
| 120x92mm Oval | Centrepiece Monsters | Bloodthirster, Terrorgheist, Zombie Dragon, Greater Daemons | Shop 120x92mm Ovals |
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. Cavalry moved from 25x50mm to 30x60mm. 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 | Shop 25mm Square Bases |
| 30x30mm | Square | Heavy Infantry, Characters | Chaos Warriors, Black Orcs, Saurus Warriors, Temple Guard | Shop 30mm Square |
| 30x60mm | Rectangular | Cavalry | Empire Knights, Chaos Knights, Bretonnian Knights, Dark Riders, Goblin Wolf Riders | Shop 30x60mm Cavalry Bases |
| 40x40mm | Square | Monstrous Infantry | Ogres, Trolls, Kroxigor, Minotaurs, Ushabti | Shop 40mm Square Bases |
| 50x50mm | Square | Monstrous Cavalry, Large Characters | Monstrous Cavalry, Dwarven Shieldbearers, mounted characters on large steeds | Shop 50mm Square Bases |
| 50x100mm | Rectangular | Chariots | All standard chariots (Tomb Kings, High Elf, Empire) | Shop Chariot Bases |
| Large (varies) | Square/Rect. | Monsters, War Machines | Dragons, Steam Tanks, Treemen—use the base provided with the model | Custom via BaseMaker |
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 25x50mm cavalry moving to 30x60mm. Check the Specialty Movement Trays collection.
LITKO also makes formation movement trays for The Old World, including lance formation trays for Bretonnian knights on 30x60mm bases.
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, Kommandos, basic trooper-type operatives | Shop 25mm Bases |
| 28mm Round | Standard Operatives | Kasrkin, Mandrakes, Corsairs, Astartes Scouts, Arbites, Hearthkyn Salvagers | Shop 28mm Bases |
| 32mm Round | Power Armour Operatives | Phobos Strike Team, Legionaries, Chaos Space Marines, Intercessors | Shop 32mm Bases |
| 40mm Round | Heavy / Specialist Operatives | Nightmare Hulks, Traitor Ogryn, Tempestus Turrets | Shop 40mm Round Bases |
| 50mm Round | Large Operatives | Genestealer Patriarch, Technomancer, large specialist models | Shop 50mm Round Bases |
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. Cavalry on 25x50mm needs to move to 30x60mm. 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. As of the June 2026 launch (pre-order June 6, release June 20), no base-size changes have been announced for 11th Edition. The standard 25mm / 32mm / 40mm round bases that anchor most current 40K units have been the GW standard for nearly a decade. Your existing 10th Edition army is tournament-legal on the same bases. We will update this guide within 48 hours of any official announcement—see the 11th Edition section above for the latest.
Related Guides
- Warhammer 40K Token Guide — Status, movement & objective tokens for 11th Edition
- All Base Size Guides — Master index for every game system
- All Miniature Base Sizes — Size-first reference, every shape and material
- Age of Sigmar Base Sizes Guide — All factions, 4th Edition quick-reference chart
- Kings of War Base Sizes Guide — Multi-basing, formations, Old World comparison
- Star Wars: Legion Base Sizes Guide — All factions, notched bases
- Historical Wargaming Basing Guide — DBA, Black Powder, SAGA, Chain of Command
- Bolt Action Base Sizes Guide — Infantry, vehicles, weapons teams
- Magnets for Miniatures Guide — magnet sizes, magnetizing & storing your army
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.
Precision laser-cut in Valparaiso, Indiana. Clear acrylic, plywood, and magnetic options. Use code WH40K10 for 10% off. Grab the print reference card to take this guide to the table.
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