BKL-120
Solid cast brass, keeper or slider buckles are made for 1/4-inch belts or straps.  Outside dimensions are 7/16″ by 13/16″.
These are small – would work for small straps or cat collars.  Not sure how the photo looks on your screen but these babies are gold/shiny brass.
Pack of 10 is $5.00, or 100 for $30.00, or 1,000 for $200.00, and please don’t forget that USA shipping is included in these prices.  That’s it.