WONPAD: Standard sizes 1" thick 1" x 30" w x 29" l 1" x 30" w x 30" l 1" x 30" w x 31" l 1" x 30" w x 32" l Corner Options: Square or small round corner Regular vent:: 3 holes down the spine of the pad Flex vent: 1-6" wither vent and 4-6" cross vents $129.95 WONPAD: Standard sizes 1/2" thick 1/2" x 30" w x 29" l 1/2" x 30" w x 30" l 1/2" x 30" w x 31" l 1/2" x 30" w x 32" l Corner Options: Square or small round corner Regular vent:: 3 holes down the spine of the pad Flex vent: 1-6" wither vent and 4-6" cross vents