9.9 cm x 10.1 cm (3.92 in x 4 in). 284 2-ply sheets per roll. 51 sq m (555 sq ft). 18 mega = 72 regular (based on number of sheets on Charmin Regular Roll). Irresistibly soft, use less (vs leading USA 1-ply bargain brand). Total 18 rolls. Clog safe. Septic safe. Loooong-lasting roll. 1 mega = 4 regular rolls (based on number of sheets on Charmin Regular Roll). Roll Fit Guarantee: If not satisfied with the roll fit of Charmin Mega Roll, send original receipt, original UPC and form completed at www.charmin.com/guarantee within 60 days of purchase for a refund. Limited to one redemption per household; no organizations. Refund is the cost of one package of Charmin Mega Roll Toilet Tissue, plus $1 for postage. Allow 6-8 weeks for a refund. Call 1-855-814-5064 or visit www.charmin.com/guarantee for details). Facebook. Twitter. Join the conversation with charmin and don't forget to enjoy the go! Charmin is safe for your sewer or septic system. FSC: Mix - Paper from responsible sources. www.fsc.org. Rainforest Alliance certified. Good Housekeeping: Since 1909. Quality tested. Limited warranty. ghseal.com for details.www.pg.com. how2recycle.info. Questions? 1-800-777-1410 www.charmin.com. Made in the USA from domestic and imported materials.