These earring hooks are designed with a 2.5mm hole , you can DIY these earring studs with loop hole by yourselves [GOLD PLATED HOOKS WITH ZIRCONIA]: Made of 18k gold plated brass and shiny rhinestone, bright color not easy to rust or fade, cubic zirconia shines brighter in direct sunlight, adding to the wearer's charms. [1 BOX 10 PAIRS EARRING]: Including 10pairs/20pcs earring hooks in 2 colors: gold and platinum, each color 5 pairs, all storage in a small plastic box: 2.67x2.04x0.43inch(6.8x5.2x1.1cm). [SIZE]: About 19x11mm, hole: 2.5mm, pin: 0.7mm, this is perfect size to design your personalized jewelry and enjoy the fun of DIY. [POPULAR STYLE]: These earring hooks are designed with a 2.5mm hole , you can DIY these earring studs with loop hole by yourselves, change them into dangle charm earrings, tassel earrings, chain earrings, drop earrings or triple drop earrings. [BEST GIFT]: You can use earring hooks to make some delicate handicrafts as presents to your family members and friends on Valentine's day, Halloween, Christmas, New Year or birthdays.