Roblox studs to meters: 1 stud = 28 cm, and why imports come in the wrong size

The conversion

Roblox's units page defines:

• 1 stud = 28 cm
• 1 metre = 25/7 ≈ 3.57 studs
• 1 foot ≈ 1.09 studs, and 1 stud ≈ 0.92 ft

Roblox notes that the physics engine doesn't use units internally, so you could treat a stud as a foot if you were consistent. It recommends sticking with the standard conversion so everything, including VR controls, behaves as expected.

How big things are in studs

• A Normal-scale avatar mannequin is about 5.75–6.5 studs tall, Slender about 5.25–6.25, and Classic about 4.75 (accessory specifications).
• Roblox's built-in Part materials show a 1024-pixel texture across an 8×8-stud face, a useful yardstick for your own texture density (texture specifications).
• A 2 m doorway is about 7.1 studs, and a 1 m crate about 3.6 studs.

Real-world sizes make a decent first guess. Most games then scale props up a little relative to characters, so the scene reads well at Roblox's camera distance.

Why imports come in the wrong size

Blender's FBX export

Exported with defaults, Blender FBX files often import much too large. Roblox's Blender guide recommends Transform ⟩ Apply Scalings ⟩ FBX Unit Scale at export, with every other scale value left at 1.0. Older tutorials suggest scaling by 0.01 instead. That works in Studio, but the model then comes back tiny if you re-import it into Blender.

The Importer's unit setting

Under File Geometry, Scale Unit tells Studio what one unit in the file means. Leave it at Stud to take values as-is, or set Meter if the file was authored in real-world metres.

The June 2026 change

Until June 2026 the Importer treated 1 metre as 20 studs, an old ratio that made metre-scale models about 5.6× too big. From 16 June 2026 it uses 25:7, consistent with 1 stud = 28 cm. Centimetres, millimetres, feet and inches all shift by the same factor.

The same update added a Scale Factor field, default 1.0, saved with Importer presets, which multiplies the unit conversion. To reproduce the old 20:1 behaviour, set Scale Factor to 5.6.

A reliable routine

1. In Blender, set Scene ⟩ Units ⟩ Unit System to None, per Roblox's guide, and model at stud scale. Or model in metres and import with Scale Unit = Meter.
2. Export .glb. If you need FBX, use FBX Unit Scale.
3. In the Importer, check the dimensions shown before clicking Import.
4. Drop a 1-stud Part or a character next to the model to sanity-check.

Scale is easy to fix, and shape isn't

Scale is one setting. A model with the wrong silhouette or too many triangles is a remodel. Get the shape right first: Vi3W generates from a prompt, photo or sketch and retopologises to low poly, so all that's left in Studio is the scale. Make a model in Vi3W.