SIZE: plastic buttons,the diameter approx.1cm/0.39in;For the metal part of the pin,the length approx.1.5cm/0.6in. MATERIAL: These practical twisty pins are made of high quality plastic and stainless steel,sturdy,durable and reusable. PRACTIAL TOOL：clear heads twist pins have rust resistant construction, secure to furniture without harming fabric, bring convenience to your life. EASY TO USE: These bedskirt holding pins twist in very easily all around the bed without the need for any special tools.Simple to remove by coiling in opposite direction.No harm to fabric. MULTIPURPOSE: useful twist pins for upholstery, arms covers, slipcovers, bedskirts, doilies, easy to remove, convenient to use, hold the skirt to the mattress