The carapace (upper shell) of blanding's turtle is elongated and neither keeled nor serrated. It is predominantly a dull charcoal color, varying from black speckled with yellow to black with yellow markings. The plastron (under shell) is yellow and hinged. It is connected to the carapace by ligaments. The flattened head is moderate in size with a non-protruding snout, a notched upper jaw, and protruding eyes. The neck is very long, and the feet are webbed. Males have dark pigmentation on the upper jaw, and females have yellow upper jaws. Females also have longer plastra and higher carapaces then males. The throat and lower jaw are yellow. This turtle grows to a maximum length of 9½ inches.