Natural Mother of Pearl with iridescent tones of pale silvery grays, light taupes and tans, hints of pinks and greens. They area 5/8" at their widest petal-to petal.  Two holes about 2mm. There is a bit of variance in thickness per the photos, but most are quite thin. Beautiful glow, simple and sweet 6-petaled flower. 

Pack of 10 for $4.25    Order "1" for a pack of 10 buttons.  "2" for 20 buttons, etc.