Nine color-coded squares in fractions of 1/2, 1/3, 1/4, 1/5, 1/6, 1/8, 1/10, 1/12 plus a whole. Made of dense foam, these squares are quiet and easy to handle. 51 pieces in resealable bag, 1/2 cm thick. Grades 2-8 WARNING: CHOKING HAZARD -- Small parts. Not for children under 3 yrs.