The sizes are real. Each tooth is the crown of a large adult of its kind, measured from the literature: a Megalodon's 165 mm (6.5 in), a T. rex's 150 mm crown, a Spinosaurus's 105 mm cone, a great white's 62 mm, a mosasaur's 48 mm, a Velociraptor's 25 mm. Serrated species carry their saw along both edges. The hand is a typical child's (150 mm, heel to fingertip) or adult's (190 mm). Made in PLA, face up, in three colors: the plate, the tooth standing 1.2 mm proud, the hand inlaid flush; the lettering engraved, or raised in a fourth color. A hole-free plate: hang it with a strip or stand it on a shelf.