[SIZE]: Head diameter is 11mm(0.43"), nail length is 17mm(0.67"), nail shank is 1.4mm(0.055'') [Color]: Black Painted [USAGE]: Decoration for sofa,headboard, wooden furniture, jewelry box, and other DIY creative decorations. It is also well suited to secure paper items or photos onto the the cork board without causing any damage. [REMIND]: To protect and keep the good looking of the tacks, we suggest you to use rubber hammer for installation. [Quantity]: 500pcs a box, the quantity could meet all your daily needs. High quality can sustain long-term use., Weight: 0.9479877266 pounds, Manufacturer: Let's Decorate