MICHLEY Interlocking Builders Blocks Play Set for Child SAFETY MATERIAL: ABS is relatively harmless in that is doesn't have any known carcinogens, and there are no known adverse health effects related to exposure to ABS. That said, ABS is typically material suitable for building blocks. SQUARE SIZE: 56*56*1.5mm(2.16*2.16*0.06"). Triangle size: 56*76*1.5mm(2.16*2.95*0.06"). Pls check the second picture for size information.This product was designed for kids ans fit for little fingers to assemble.This size will not be the as big as the adult palm. Pls check the size before order . QUANTITY: Builder set for boys are about 90-95pcs per pack, If your kids want to build many shapes or with other friends to play together, we recommend you purchase more than 2 packs. Thus your children will get more fun. EDUCATIONAL TOYS: Link Interlocking blocks together while improving independent play, hand eye coordination, spatial skills & dexterity. Great for sensory development, occupational therapy and autistic individuals. MORE FUNCTIONS: Except of building many shapes, your kids can build toy boxes, pencil case, tissue box and other things. 100% Satisfication: If you are not happy for this order, fully refund within 30 days.