Driving Pony Buckle. The largest version of the Driving Pony as a Buckle measures 1 3/4 inch wide x 1 1/2 inch tall. This design has raised detail with a bridle and blinders and some of the driving harness is visible. This buckle always sells out. He is awesome. Fits a 1 1/4 inch leather belt. Check our Leather Page for available belts.