Avery Mini Durable Binder for 5.5 x 8.5 Inch Pages, 2-Inch Round Ring, Black, 1 Binder (27554) Mini binder for 5-1/2-Inch x 8-1/2-Inch sheets Gap Free round 2-Inch ring prevents gapping and misalignment of rings Two interior pockets Vinyl. The Gap Free rings hold up to 375 sheets of paper