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Warhammer 40K Base Sizes Update: Check Your Unit and Event

Find the official Warhammer 40K base-size guide, match exact unit names, and check event requirements before rebasing your painted miniatures.

Frequently Asked Questions

Where is the official Warhammer 40K base-size update?

The official Warhammer Event Companion checked for this guide includes a Base Size Guide marked June 2026. The guide starts on the document’s printed page 54 and groups entries by faction. For later revisions, begin at Warhammer Community downloads. Our check on October 9, 2026 does not establish a separate October base-size change list. Keep the document date beside your notes so another player can reproduce your lookup. A newly circulating screenshot is not, by itself, evidence that every base in an army has changed.

Do all Space Marines use the same base size?

No. The checked guide lists Intercessor Squad at 32mm and Heavy Intercessor Squad at 40mm. Those examples show why the full unit name matters. They are reference entries, not a claim that either unit changed size in this update. For your own checklist, record the faction, exact entry, base shape and dimensions together. If a model could represent more than one unit, resolve the intended identity first. Do not select a diameter just because a similarly named miniature or a visually similar conversion uses it in someone else’s photograph.

Must I rebase every older model before playing?

There is no universal requirement established by this source for every casual game. The guide frames its information around matched-play clarity, and it advises speaking to an event organiser for models marked Unique. For a tournament, use the event’s published requirements and ask about unusual or converted models before altering them. Supply a photograph and actual dimensions so the answer concerns your miniature. For a friendly game, agree on the approach with your opponent. This page cannot certify that a particular adapter, old sculpt or scenic base will be accepted at an unnamed event.

How can I explain a rebasing change in a video?

Show the miniature, its measured starting base and the replacement you actually used. Include the exact unit name and the dated source behind your decision, then label any organiser-specific ruling as such. Keep ruler markings readable and avoid perspective tricks that exaggerate the difference. For a separate introduction, CapCut AI Design can help make an original workshop-themed cover. Add measurements as checked text yourself. Generated circles and calipers are decorative elements, so they should never serve as the evidence for a claimed diameter or tournament ruling.

Create an original cover

Turn your own visual idea into a cover with CapCut AI Design. Label illustrations clearly and use real captures to document gameplay.