Simplicity offers versatility and timeless appeal. This round hoop designed from polished 10k yellow gold features a half round hollow tubing that is approximately 4.5mm (3/16 inch) in width by 18mm (11/16 inch) in diameter. Made in Italy. Polished 10k yellow gold hollow designApproximate size 4.5 x 18mm (3/16 x 11/16 inch)Hinged post with a snap down catchWeight is Approximately 1.68 grams