Universal puzzle pieces that fit together in any combination. Each person can decorate one puzzle piece to fit together to form the whole puzzle. Decorate with a variety of media. White cardboard fronts, natural color on back. Center pieces measure 4x4"". Border pieces are 2x4"". Completed size measures 20x28"". Each set has 48 pieces; 24 center, 20 border and four 2x2" corner pieces.