Compass sells a tire fit gauge here, but it only includes some useful sizes. The parametric Solidworks model for the disc can be adjusted for whatever you want.
23, 34, 38, 42, 48 and 54 mm discs are included with the kit, but I've added a 30 & 32 mm variety. In total, I've included the following tire sizes in mm:
My first attempt came out too small; it would not fit. However, minor work with a knife quickly yielded a result that did fit.
I've added a model & STL of the gauge itself, which requires an odd 13 mm axle. You can change this in the model to match whatever you have on hand.
The wheel sizes included are:
- 622 / 700c / 29"
- 584 / 650b / 27.5"
- 559 / 26"
In theory, you can change this, too, to whatever you want.