Shi 20mm D-rings are the right size for a 3/4" wide belt. They're stylishly flattened on the curved edge, and are molded (not wire that's been bent) for reliable strength. Nickel and lead free. Made in China.
Inside: 20mm X 11mm (3/4" X 7/16")
Outside: 24.5mm X 15mm (15/16" x 5/8")
D-rings are sold by the piece (1). It takes a pair of D-rings to make an adjustable belt, therefore, the minimum order quantity is two pieces. We also sell two larger sizes of Shi D-Rings: 25mm and 30mm.