MATERIAL→Made of high quality steel wire with good elasticity,durable with strong grip for your documents and other stuff you want to grip. SIZE→M-58*32*11mm/2.28"*1.25"*0.43" OPEN MOUTH RANGE→M size Can clamp 10-80 pieces of A4 paper,biggest mouth 1.2 cm/0.47". UNIQUE DESIGN→Creative simple hollow metal binder clips that does not fade without distortion super strong! Unique design that will not cover your files,bright colors with special shape with good decorative. Multi-Purpose→Great for Paper Invoice Bill Office Supplies.Binder clips are reusable,providing longtime operation,easy to use for organizing paper,documents,photos,notebooks,etc.in office,at school or daily life,bringing you more fun. Smooth wire office clips perfect for girls, kids, high-school students, office workers, archivists, designer, secretaries, lawyers, desk-clerks and more Personalized paper clips heavy duty, easy to use for organizing paper, documents, photos, notebooks, etc. in office, at school or daily life, bringing you more fun. Easy to use and convenient to storage. According to the need to choose to suit your size.