We have a great buckle for medium-sized decorative dog collar (a "D" ring will be needed for leash attachment). It can also be used for quick-release closure for laptop and messenger cases. This buckle can fit up to 5 strands of the 4mm - 6mm Bonnie Braid cord through each end. The 20mm (a little over 3/4 inch or 25/32") buckle. Available in packs of 4 or 100 complete buckles.
Made in China.