This is our reference chart for tabletop base sizes and the magnets that fit them. Every Warhammer 40K base size below was checked against current 10th edition datasheet data (Wahapedia, accessed June 2026). The Age of Sigmar diameters come from Games Workshop's official battle profiles, and the Warmachine sizes come from the official MK IV rules (Privateer Press). Find your model, read off its base, and the chart gives you the magnet we recommend for it.
Why magnetize a base at all? Magnetized bases lock your models into a steel-lined case for transport, hold a squad steady on a movement tray, and grip a steel shelf for display. This page is the size lookup. For the technique side, drilling, gluing, and polarity, see the base magnetization guide.
Base size to magnet: the quick chart
Three ways to magnetize a base: a flush-fit magnet that seats inside the recess of a Citadel base, a peel-and-stick disc cut to the base diameter, or a premagnetized base that replaces the stock one. Match the row to your base size.
| Base size | Flush-fit magnet | Peel-and-stick | Premagnetized base |
|---|---|---|---|
| 25 mm round | Medium (4.5 mm × 2.2 mm) | 25 mm disc | Available |
| 28 / 28.5 mm round | Medium (4.5 mm × 2.2 mm) | 28 mm disc | Available |
| 32 mm round | Large Thick (6 mm × 2.6 mm) | 32 mm disc | Available |
| 40 mm round | Large Thick (6 mm × 2.6 mm) | 40 mm disc | Available |
| 50 mm round | Large Thick (6 mm × 2.6 mm) | 50 mm disc | Available |
| 60–90 mm round | Large Thick (6 mm × 2.6 mm) | Not offered at this size | Not offered |
| 100 mm round and up | Large Thick (6 mm × 2.6 mm) | Three 25 mm discs in a triangle | Not offered |
| 60–120 mm oval | Large Thick (6 mm × 2.6 mm) | Three 25 mm discs in a triangle | Not offered |
| 130 mm, 160 mm round and 170 mm oval | Not offered at this size | Three 25 mm discs in a triangle | Not offered |
The flush-fit product covers 25–100 mm round and 60–120 mm oval bases. On the biggest footprints, three peel-and-stick discs spread in a triangle hold better than one center magnet, because they resist tipping at the rim.
[Buy Product=gw-flush-fit-base-magnets-large,variant=All] [Buy Product=flexible-self-adhesive-magnets,variant=All] [Buy Product=bases-premagnetized-warhammer,variant=All]Warhammer 40K base sizes by model
Sorted smallest to largest. These are the current official base sizes per 10th edition datasheet data. Games Workshop occasionally updates a base size between editions, and a few older boxes shipped with a smaller base than the current official listing, so if your model is already built, measure the base before ordering.
| Model | Faction | Base size | Magnet we recommend |
|---|---|---|---|
| Cadian Shock Troops | Astra Militarum | 25 mm round | Medium flush-fit or 25 mm peel-and-stick |
| Scout Squad | Space Marines | 28.5 mm round | Medium flush-fit or 28 mm peel-and-stick |
| Termagants | Tyranids | 28.5 mm round | Medium flush-fit or 28 mm peel-and-stick |
| Guardian Defenders | Aeldari | 28.5 mm round (weapon platform on 40 mm) | Medium flush-fit or 28 mm peel-and-stick |
| Intercessors | Space Marines | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Infiltrators | Space Marines | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Chaos Legionaries | Chaos Space Marines | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Necron Warriors | Necrons | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Immortals | Necrons | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Genestealers | Tyranids | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Ork Boyz | Orks | 32 mm round | Large Thick flush-fit or 32 mm peel-and-stick |
| Terminator Squad | Space Marines | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Aggressors | Space Marines | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Captain (power armour) | Space Marines | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Inceptors | Space Marines | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Custodian Guard | Adeptus Custodes | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Allarus Custodians | Adeptus Custodes | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Zoanthropes | Tyranids | 40 mm round | Large Thick flush-fit or 40 mm peel-and-stick |
| Skorpekh Destroyers | Necrons | 50 mm round | Large Thick flush-fit or 50 mm peel-and-stick |
| Tyranid Warriors | Tyranids | 50 mm round | Large Thick flush-fit or 50 mm peel-and-stick |
| Crisis Battlesuits | T'au Empire | 50 mm round | Large Thick flush-fit or 50 mm peel-and-stick |
| Contemptor Dreadnought | Space Marines | 60 mm round | Large Thick flush-fit |
| Helbrute | Chaos Space Marines | 60 mm round | Large Thick flush-fit |
| Hive Tyrant | Tyranids | 60 mm round | Large Thick flush-fit |
| Deff Dread | Orks | 60 mm round | Large Thick flush-fit |
| Broadside Battlesuit | T'au Empire | 60 mm round | Large Thick flush-fit |
| Wraithlord | Aeldari | 60 mm round | Large Thick flush-fit |
| Vertus Praetors | Adeptus Custodes | 75 mm × 42 mm oval | Peel-and-stick disc sized to the flat underside |
| Leviathan Dreadnought | Space Marines / Heresy | 80 mm round | Large Thick flush-fit |
| Redemptor Dreadnought | Space Marines | 90 mm round | Large Thick flush-fit |
| Ballistus Dreadnought | Space Marines | 90 mm round | Large Thick flush-fit |
| Armiger Warglaive / Helverin | Imperial Knights | 100 mm round | Large Thick flush-fit or three 25 mm peel-and-stick |
| War Dogs (Karnivore, Stalker, Brigand) | Chaos Knights | 100 mm round | Large Thick flush-fit or three 25 mm peel-and-stick |
| Telemon Heavy Dreadnought | Adeptus Custodes | 100 mm round | Large Thick flush-fit or three 25 mm peel-and-stick |
| Norn Emissary | Tyranids | 100 mm round | Large Thick flush-fit or three 25 mm peel-and-stick |
| Carnifex | Tyranids | 105 mm × 70 mm oval | Large Thick flush-fit |
| Tyrannofex / Tervigon | Tyranids | 120 mm × 92 mm oval | Large Thick flush-fit or three 25 mm peel-and-stick |
| Riptide Battlesuit | T'au Empire | 120 mm × 92 mm oval | Large Thick flush-fit or three 25 mm peel-and-stick |
| Defiler | Chaos Space Marines | 160 mm round | Three 25 mm peel-and-stick in a triangle |
| Knight Paladin / Errant (Questoris) | Imperial Knights | 170 mm × 109 mm oval | Three 25 mm peel-and-stick in a triangle |
| Knight Castellan / Valiant (Dominus) | Imperial Knights | 170 mm × 109 mm oval | Three 25 mm peel-and-stick in a triangle |
| Canis Rex | Imperial Knights | 170 mm × 109 mm oval | Three 25 mm peel-and-stick in a triangle |
| Knight Abominant / Desecrator / Rampager | Chaos Knights | 170 mm × 109 mm oval | Three 25 mm peel-and-stick in a triangle |
| Gorkanaut / Morkanaut | Orks | 170 mm × 109 mm oval | Three 25 mm peel-and-stick in a triangle |
| Doomsday Ark | Necrons | 60 mm flying base | See flying bases below |
| Wave Serpent | Aeldari | 60 mm flying base | See flying bases below |
Flying bases and skimmers
Skimmers and flyers like the Doomsday Ark and Wave Serpent sit on a clear stem over a 60 mm flying base, so the magnet question splits in two: the base-to-tray hold (same Large Thick flush-fit as any 60 mm base) and the model-to-stem connection, which is where a magnetic flight stand earns its keep. We covered that side in full in our flight stand basing guide.
Age of Sigmar base sizes
Age of Sigmar runs on the same round-base system, with official diameters of 25, 28.5, 32, 40, 50, 60, 80, 90, 100, 130 and 160 mm, plus ovals such as 60 mm × 35 mm for cavalry (Games Workshop battle profiles). Liberators stand on 40 mm rounds; a Megaboss on Maw-krusha fills a 160 mm round. The quick chart at the top applies unchanged: match the diameter, pick flush-fit or peel-and-stick.
Warmachine MK IV base sizes
Warmachine MK IV uses exactly five base sizes: 30 mm small, 40 mm medium, 50 mm large, 80 mm extra large and 120 mm huge (Privateer Press MK IV rules). The same size ladder applies, and we keep a dedicated Warmachine and Hordes base magnet guide with the per-size picks.
Give the magnet something to grip
A base magnet only works against a ferrous partner, so plan both halves of the connection. The usual pairings: a steel-lined transport case, a steel sheet fixed into a display shelf or carry tray, and a movement tray built to hold magnetized bases, which lets you lift a whole ranked-up squad in one move. Whichever you choose, the magnet sizes in the chart above stay the same; the steel side just needs to be flat and clean. If you are weighing flush-fit against peel-and-stick, the short version is that flush-fit seats inside the recess of a hollow base and disappears, while peel-and-stick is the faster, no-glue route and the only option we make for solid or oversized bases.
Base size FAQ
What size magnets work for Warhammer bases?
One magnet matched to the base diameter: a Medium flush-fit (4.5 mm × 2.2 mm) for 25–28.5 mm bases, a Large Thick flush-fit (6 mm × 2.6 mm) for 32–100 mm bases, or a peel-and-stick disc in the matching diameter. From 100 mm up, three 25 mm peel-and-stick discs in a triangle resist tipping better than one center magnet.
What base size are Intercessors on?
32 mm round, like most Primaris infantry. Classic-scale infantry such as Cadian Shock Troops sit on 25 mm rounds, and Scouts on 28.5 mm.
What base size is a Chaos Knight on?
War Dogs sit on 100 mm rounds. The large chassis, Knight Abominant, Desecrator and Rampager, share the 170 mm × 109 mm oval with their Imperial counterparts.
What base does the Doomsday Ark use?
A 60 mm flying base with a clear stem. The base itself takes a Large Thick flush-fit magnet; for magnetizing the model to the stem, see our flight stand guide.
How many magnets does one base need?
One, up to about 90 mm. Past 100 mm, and on the big knight ovals, we recommend three 25 mm discs spread in a triangle so the rim cannot lever the model off a tray.
Do Age of Sigmar models use round bases?
Yes. Current Age of Sigmar models ship on rounds from 25 mm up to 160 mm, with ovals for cavalry and some monsters, so the same magnets fit both games.
For pull-force numbers on every magnet size mentioned here, see our magnet specifications page. If a base size on your bench is not in the chart, send it to us and we will point you to the right magnet.