[18K Gold Plated studs]: The open jump ring set is made of 18k gold plated brass, the golden yellow sparkles, which makes it more textured, not easy to rust or fade, won't bring burden or cause discomfort to your skin, safe and comfortable to use. [20Pcs Studs and 20Pcs Nuts In A Box]: 20Pcs blank post stud earrings, and 20pcs ear nuts, all packaged in a small box: 74x72x17, easy to not lose the pieces, can keep rings for dirty. [Size]: Blank post earring studs: about 13.5mm long, 11mm wide, aperture: 2mm, needle diameter: 1mm, tray: 8 mm, ear nuts: about 0.28in/7mm wide, 0.2in/5mm long, and 0.04in/0.8mm aperture. [Easy to Use]: The flat round studs with metal loop applied, you can put your favorite charms on. Also can choose the flat back cabochons/mosaic glass tile that fit the size of these earrings, stick photos, decorative paper and wrapping paper under glass cabochon, then glue on the blank tray, then a pair of earring studs in your own styles is done with ease, use your imagination to start DIY. [Ideal Gift]: A great gift for yourself or your family members, friends, colleagues, relatives, neighbour, especially suitable for craft enthusiasts. Suitable for sending this gift on birthday, Thanksgiving, etc.