Be prepared for button emergencies with this assorted pack. Package contains two common sizes suitable for blouses and shirt fronts, collars and cuffs. White pearl and black anthracite. 4 sewing holes. Machine washable. 100% polyester. This package contains 20 buttons total. Contents include 10 white 11mm buttons, 4 white 9mm buttons, 4 black 11mm buttons, and 2 black 9mm buttons.