Fiberon ArmorGuard Deck boards are .093 in. x 5.25 in. Grooved(for hidden fastening) deck boards are available in 12, 16 and 20 ft. lengths. Square edge deck boards (for picture framing, stair treads and risers) are available in 8 and 20 ft. lengths. ArmorGuard Fascia boards are .75 in. x 11.25 in. and available in 8 and 12 ft. lengths.