Pro model line from Zap include: James Lovett, Steve Boomhower, EOS team rider Hugo Santos and Jason Wilson Dimensions and Sizes: X-Small: 49" x 19" Up to 90 lbs Small: 51" x 20" Up to 135 lbs. Medium: 53" x 20.25" Up to 165 lbs. Large: 54.5" x 20.5" Up to 185 lbs. X-Large: 56" x 20.5" X-Large: Up to 225 lbs.