Check the listing for details. Rayson CR-12-100-M Plastic Binding Combs 1/2in. 21-Ring, 90-Sheet Capacity, C.... Color: Black, White, Clear, Green, Blue, Yellow, Red, Condition: New. Listed at 23.75 USD. Rayson CR-12-100-M Plastic Binding Combs 1/2in. 21-Ring, 90-Sheet Capacity, Colorful Comb Binding Spines, Max. Binding A4 Size Paper (8.3"×11.7"), Box of 100 ✓ Free 60 Day Returns ✓ Free Express Shipping Description: Features: The 21 hole comb binding ring fits A4 sized paper (8.3 x 11.7inches), which is not a standard U.S letter paper size (8.5 x 11inches). Binding letter size need to use the scissor to cut off two rings. The picture shows the difference between A4 and letter size paper.Sheet Capacity: 90; Spine Diameter: 1/2"; Number of Rings: 21, length: 11.8inches/ 30cm.Get a professional edge! Quantity/Unit - 100/BoxAvailable in a variety of sizes and colors to bind 2-90 page documents. 3mm margin for binding 2-90 sheets ( max. binding thickness: 9.5mm/0.37in), 6mm margin for binding 60 sheets ( max. binding thickness: 8mm/0.31in).Designed for a variety binding of paper size. Perfect for internal reports and functional documents. Product Details: Manufacturer: ‎RAYSON ELECTRICAL MFG. LTD.Brand: ‎RAYSONItem Weight: ‎1.36 poundsPackage Dimensions: ‎12.87 x 6.38 x 3.43 inchesIs Discontinued By Manufacturer: ‎NoColor: ‎Black, White, Clear, Green, Blue, Yellow, RedMaterial Type: ‎PVCSize: ‎1/2" - A4 sizeManufacturer Part Number: ‎10305563Date First Available: September 18, 2017