Each cover measures 22mm in diameter; Cap Size: 22mm x 3.7mm/0.87" x 0.15" (D*H)Screw Total Size: 7.2mm x 23mm / 0.28" x 0.91" (D*L); Screw Thread Size: 3.2mm x 19mm / 0.13" x 0.75" (D*L); Washer Size: 22mm x 5mm / 0.87" x 0.2" (D*T)Solid 201 Stainless Steel construction, ensuring durability and longevity. Wire Drawing to resist daily corrosion, tarnishing.Will not crack or fall apart like cheap plastic covers; smooth surface, make the screws look beautiful, easy to install and clean.Widely used in mirrors, tea tables, glass sign, other wood or glass furniture.