Convex (Outside) Corner Radius Measuring Tool
thingiverse
I created this tool for measuring the radius of convex corners of real-world objects, mainly for coding 3D models. (Subsequently I found that several others have designed similar tools of various names such as "fillet gauge", "radius gauge", etc, so pick your favorite. :-) I've attached STL files for a few different versions. You'll probably need to rotate the longer ones to fit on the printer bed. You can scale along the Z axis to change thickness if desired (I wouldn't recommend scaling the other axes if you want the measurements to be correct. :-) SCAD file included for those who may wish to customize. [12/19/21: Updated all files to correct depth of cutouts for 90-degree corners]
With this file you will be able to print Convex (Outside) Corner Radius Measuring Tool with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Convex (Outside) Corner Radius Measuring Tool.