Duffle toggle button

thingiverse

A straightforward design for a replacement duffle coat toggle button. Easily modified in size to suit your needs. It features a flat underside that is ideal for printing, although having a rounded underside would be possible if printed with support material. However, those supports themselves can leave marks on the surface. If you're particular about surface finish, it may require some sanding. It requires several top and shell layers to seal the top surface effectively. The specific requirements depend somewhat on nozzle size and layer height, but I've found that printing with a 0.4mm nozzle at 0.1mm layer height, three shells, and four top layers yields excellent results.