What is a sea turtles size and coloration?

This depends on what type of sea turtle you're talking about. Green sea turtles reach about 78 to 112 cm (31-44 in.) and 68 to 186 kg (150-410 lb.), while leatherbacks reach about 1.2 to 1.9 m (3.9-6.2 ft.) and 200 to 506 kg (441-1,116 lb.).

Green Sea Turtles have green flesh. The shell is olive brown to black, while the skin is pale yellow to creamy white. The shell has many different colors. Very rarely will you find a green sea turtle with a solid colored skin. The leatherback turtle is darkly-colored, with white and pink spots.