22Pcs 28mm/35mm Plastic Round Book Binding Discs Discbound Expansion Discs Plating Round Binder Rings for DIY Notebook Planner These plastic book binding discs can be applied for A7, A6, A5, A4, and B5 papers in various sizes, and suitable for loose-leaf, memo filing, scrapbooks, good for fastening pretty document stacks, index, cards, notebooks, disc planner make them organized and not messy._x000D_ _x000D_ Specification _x000D_ Material: Plastic_x000D_ _x000D_ each binder ring measures: 35mm/28mm diameter and 5mm/0.2inch thickness.Packing List: 22 x Discbound Discs_x000D_ _x000D_ Advantage _x000D_ These binder disc rings are made of good quality plastic, lightweight, and portable. You can take it to or office and anywhere._x000D_ _x000D_ Instruction _x000D_ Just clip them to the paper to organize them._x000D_ _x000D_ NOTE: Please check the size carefully before purchasing if you are concerned. _x000D_