SpongeBob is a sea sponge with a rectangular shape, despite being designed to look like an actual kitchen sponge. He is light yellow (whose exact shade of yellow is designated by Pantone to be SpongeBob Yellow[25]) with a light olive-green outline. In earlier episodes, he is wider near the top and gets skinnier going further down, akin to that of a trapezoid. However, in the more recent episodes, he is more of a regular square shape.