Only 3/8 of an inch thick. The tip and tail are unique in that the core is actually molded to a concave shape which houses a center fin. In addition to the center fin, there are two 1.5" fins on the outer edge of the board. The concave shape allows the center fin to sit up in the board further, which stops the board from being to "tracky." All graphics are available on top or bottom of all boards.