Radius Plate for design estimation and sketching

This is a humble 220 mm x 131 mm rectangular footprint with a different (labeled) radius on each corner to ballpark sizes that exceed convenient measurement. My first use was to start visualizing how a shower organizer will fit.

Why a big plate?

Finer gradations of curves could be put on a flip-ring, but a physical plate of inexpensive material can be casually marked, others can be encouraged to help mark off where things might look good, marks where allowances for other things can be made, and so on. Mark where you might want things, etc. You can use the same gauge indefinitely or you can Sharpie your whole design's first draft while you're in creative mode and holding a print right where you want to fit an organizer, lip on the edge, etc. Essentially, having one (or two) of these in-hand frees up the creative process a bit in addition to the reference radii so when you fillet an edge and it asks you the radius then you have an idea where to start on your design draft. Clear visualization from the start of a project prevents having to make refinements of much bigger prints and saves material.

A second method may be better if your workflow preference is to get detailed on paper. You can allow paper to overhang the corners that do not fit, wrap the corner that does, mark the paper where rounding begins and ends, trace the two closest radii between those points so you can dial in a safe radius for your design, and then you still have the paper (albeit with one crinkled corner) for sketching and marking but can set the gauge aside while you think.

It can also be held against a solid, curved object (such as the corner of a countertop) as an initial reference.

Radius Gauge plate (40-50-60-70 mm) no AMS

0.2mm layer, 2 walls, 15% infill