... -By-Step Instructions4 Great Choices 10'W x 15'L x 8'H, 4-Rib, 10'W x 20'L x ... Brown, Tan, White, Clear 13'W x 20'L x 10'H 6-Rib, - Super Heavy Duty Cover 14.5 oz.- 13 ... 'W x 24'L x 10'H 7-Rib, - Super Heavy Duty Cover 14.5 oz.- ... 13'W x 28'L x 10'H 8-Rib, - Super Heavy Duty Cover 14.5 oz.- ... Cover 14.5 oz.- 13'W x 36'L x 10'H 10-Rib, - Super Heavy Duty Cover 14.5 oz.- boat ...