12 double rolls equal 24 single rolls. Each roll is 37.5 sq. ft. 300 1 ply sheets per roll - 4.5 x 4.0 in. Total 450 sq ft. (40.8 m2). Enriched with aloe & vitamin E. Roll size guide: 1 single roll (150 sheets). 1 double equals 2 single (300 sheets). 1 triple equals 3 single (450 sheets). Sewer and septic system safe. Made in the USA from domestic and imported materials.