12 double rolls equal 24 single rolls. Each 44 sq ft. 352 1-ply sheets per roll. 4.5 x 4.0 in. Total 528 sq. ft. With ripples, Roll size guide: 1 single roll (176 sheets). 1 double equals 2 single (352 sheets). 1 triple equals 3 single (528 sheets). Sewer and septic system safe. Made in the USA from domestic and imported materials.