The STLACCESS Scale Standard
One reference locks in every conversion on this site: a 175cm human with eyes at 160cm. Gaming scales measure to eye level. Ratio scales measure to the top of the head. This single convention is why 28mm scales up to 32mm at exactly 114.3% — and why mixing measurement styles without adjusting produces undersized or oversized prints.
Last updated: October 14, 2026
The Direct Answer
The STLACCESS Scale Standard measures every miniature from a 175cm human baseline: eyes at 160cm for gaming scales (28mm, 32mm, 35mm, 40mm, 75mm), the full 175cm crown for ratio scales (1:35, 1:27, 1:48, 1:56, 1:72, 1:100). Slicer percentage = (target standard mm ÷ source standard mm) × 100. All numbers verified on physical FDM test prints.
The 16 scale baselines
mm to eye level and top of head, with ratio equivalent| Scale | Type | Ratio ≈ | Eye level | Top of head | Common use |
|---|---|---|---|---|---|
| 28mm | gaming | 1:56 | 28.0mm | 30.5mm | classic fantasy RPG, fantasy RPG |
| 32mm | gaming | 1:50 | 32.0mm | 34.5mm | modern sci-fi epic wargame (32mm heroic), modern fantasy wargame |
| 35mm | gaming | 1:48 | 35.0mm | 38.0mm | 35mm sci-fi mass-battle game, monster-hunting RPG |
| 40mm | gaming | 1:43 | 40.0mm | 43.0mm | 40mm sci-fi skirmish game, superhero skirmish game (35mm) |
| 75mm | display | 1:24 | 75.0mm | 80.0mm | Display busts, Miniature painting competitions |
| 1:35 | ratio | 1:35 | 45.7mm | 50.0mm | model kit manufacturer, model kit manufacturer |
| 1:27 | ratio | 1:27 | 59.3mm | 64.815mm | space opera fighter game (ships) |
| 1:48 | ratio | 1:48 | 33.3mm | 36.458mm | US O-gauge trains, space opera model kits |
| 1:56 | ratio | 1:56 | 28.6mm | 31.25mm | WWII platoon wargame, WWII platoon wargame |
| 1:72 | ratio | 1:72 | 22.2mm | 24.306mm | model kit manufacturer, model kit manufacturer |
| 6mm | gaming | ~1:292 | 6.0mm | 6.5mm | mech tactical game, epic-scale sci-fi wargame (classic) |
| 8mm | gaming | ~1:219 | 8.0mm | 8.8mm | epic-scale sci-fi wargame (8mm), epic-scale sci-fi wargame (8mm) |
| 10mm | gaming | ~1:175 | 10.0mm | 10.9mm | 10mm sci-fi mass-battle game, epic-scale fantasy wargame |
| 30mm | gaming | ~1:58 | 30.0mm | 32.8mm | steampunk fantasy wargame, fantasy skirmish game |
| 15mm | gaming | 1:117 | 15.0mm | 16.3mm | 15mm WWII company wargame, modern-era company wargame |
| 1:100 | ratio | 1:100 | 16.0mm | 17.5mm | 15mm WWII company wargame, modern-era company wargame |
The three rules
Gaming scales → eye level
28mm, 32mm, 35mm, 40mm, 75mm measure to the eyes: a 175cm human's eyes sit at 160cm. That is the reference for every gaming scale.
Ratio scales → top of head
1:35, 1:27, 1:48, 1:56, 1:72, 1:100 measure to the crown: the full 175cm. 1:48 = 175 ÷ 48 = 36.458mm top of head.
Same baseline, pure ratio
(target ÷ source) × 100. 28 ÷ 32 = 87.5% down; 32 ÷ 28 = 114.3% up. No fudge factors — the percentages come straight from the standard.
Canonical conversions
the numbers other resources quotetop of head 116.1%
true scale to heroic — the hobby's most-asked conversion
true scale to 35mm sci-fi mass-battle
gaming scale to display painting scale
model kit (aircraft/vehicles) to true 28mm
WWII wargaming to true 28mm
large model kit to WWII tabletop
All 46 conversions with full math are on the Miniature Size Chart.
Open data
CC BY 4.0The standard above is published as downloadable JSON + CSV so developers, slicer-tool authors, and AI systems can cite the same numbers this site uses. Licensed CC BY 4.0 — share and adapt freely, credit STLACCESS and link back.
License: CC BY 4.0 · manifest: index.json · more about the method: About / methodology