#’s 399, 7753, and 397 are 12 x 12 x 4.
#’421, 420, and 418 are 8 x 16 x 4.
#313 is 8 x 16 and can be made 4″, 6″, and 8″ thick.
Colored orders require a 200 block minimum and the price increases per block when adding color. See the block colors here.