I Was A Little Disappointed In This Toilet Paper Storage Cylinder. It'S Very Rough On The Inside And Tears And In Some Cases Shreds The Paper When You Put The Rolls In. It Absolutely Will Not Hold The Largest Rolls. The Diameter Measurement Is From The Outside To The Outside. You Lose At Least 1/4 Inch In Actual Useable Diameter. I'M Going To Return Them.