Learning the anatomy and bone structure of the human head can be fun! This Realistic Anatomical Puzzle features:Exploded Skull 1:2 Model/Puzzle W 17 Parts, Bone parts Combine together to form a complete skull, An excellent skull model to study the bone structure of the human head,Quality suited to medical educational purpose. Approximate Size :3.4 inches (87 mm) long × 4 inches (102 mm) wide × 5.6 inches (146 mm) highAges 8 and up