Flexibility test for walls designed for 0.5mm extrusion width. Features are in 0.5mm wall thickness increments to match the extrusion width: 1.0mm, 1.5mm, 2.0mm, 2.5mm. One of each thickness is printed in each of the following heights: 10mm, 15mm, 20mm, 25mm.

This test part is a physical design reference to check the flexibility of walls at different thicknesses and heights. I keep it on hand when I'm working on a design for a flexible part for 3D printing.

See also Minimum Viable Feature Test Probe - Wall and Post for another useful test model that covers more general feature sizes for rigid parts.