From Magna-Tiles®, this set features: Recommended for ages 3 years and up easy-to-hold, clear, crystalline tiles 4 small squares 4 equilateral triangles 4 right triangles 4 isosceles triangles STEM-approved: encourages the development of foundational skills like math, science, spatial reasoning, tactile concepts, and more. cloud, scratch, or dent resistant  made with food-grade ABS (BPA-free) plastic, no phthalates, latex, or other toxic materials  Package weight: 1 lb 2.5 oz / 526 g Package measurement: 9 x 2 x 7.5 inches Item measurement: each shape has a base measurement of 3 inches / 7.62 cm compatible with all Magna-Tiles® sets Imported. *Returns not accepted on any opened, used, or defective product. Contact manufacturer customer service directly for defective products/parts.