4.27 x 4 inches. 352.2 square feet. 330 2-ply sheets per roll. 9 mega rolls = 36 regular rolls (based on number of sheets). Our longest lasting roll (vs other Charmin Ultra Strong roll sizes). Septic safe. 4 regular rolls in 1 (based on number of sheets). Roll fit guarantee. Change the roll less often. Charmin is safe for your sewer or septic system. Made in the USA from domestic and imported materials.