Size: each magnets?s long and wide is measured about 3 to 5 centimeters recommended: 3 years old and UPS> set include: each 192 pcs set include: 52*uppercase letters 90*lowercase letters 30*numbers 10*symbols 10*math pattern blocks> perfect educational gift: it's good party gift for Christmas celebration, Thanksgiving new year, themed birthday, family reunion etc. A good helper for children to learn reading, vocabulary, grammar skills at home or kindergarten Classrooms> easy to use: they can stick to the refrigerator, magnetic boards, magnetic plate, easel, metal surface or anywhere with magnetic capabilities, and designed for small hands to play with.Great way to produce jumbo study fun and even bigger smiles!