jasontsr Thanks a bunch! They a listed as DNA 200 buttons. Here are the dimensions:
Small button- 4mm dia. with a 4.71mm lip. Height is 5mm total, lip height is 1.48mm.
Large button- 8mm dia. with a 10mm lip. Height is 5mm total, lip height is 1.5mm.
jasontsr I would like to use this piece but I would prefer to use a button set that I already have. Can the holes be modified?