Glistening, iridescent natural off-white/pearly tan Mother of Pearl (MOP) shell button is tiny - just 1/2" the long way, and 3/8" across. 5/8" x 7/16", with two 1.75mm holes. Natural variance per the photos; some towards pale rainbow colors and some with pretty, from-the-sea inclusions. Backs are mottled brown. Pack of 12 buttons for $6.00