Total Height: 23mm / 0.9"; Head Diameter: 19mm / 3/4"; Package includes:100Pcs Upholstery Tack Nail. Made of high quality metal and double layer electroplating process finish , smooth touch, firm and no burr, as a perfect decoration. They are of unique antique style, it is ideal for wood and leather furniture decor. You can use them as decorations on sofa, beds, wood shelves, walls, etc. Follow your creativity and enjoy your DIY fun. You can just clamp it with a plier then using a hammer to hammer it into the cork board or the edge of the sofa and soft bed easily. Under normal use, these thumb tacks can be used for long time. Please don't use any chemicals to clean nailheads, it may damage the surface finish in time, so please just clean them with dry peace of cloth. They will always stay bright. Specifications: ✿ Color: Red Copper ✿ Material: Brass ✿ Diameter of nails head: 3/4"(19mm) ✿ Shank length: 0.9"(23mm) Package Included: ✿ 100Pcs x 3/4" Upholstery Tack Warm Prompt: 1.The actual product maybe slightly different from the picture shown due to lighting and the color setting of each individual monitor. Please allow the slight color difference. 2.Small parts, not suitable for children under 3 years. 3.Use rubber hammer, safe glasses are needed. 4.Do not hammer with bare hands, in case of hurting yourself.