Slide buckle (with no prong.) The buckle is 1.75" in diameter and the buckle bar is 1 3/16". There is simply a bar in the center to slide over the belt of your choice.
I used this buckle as an embellishment for my wedding invitations. The buckle is very durable and strong and it sparkles beautifully. I emailed customer service some questions before purchasing this piece and they were very prompt and answered all questions. This embellishment really made the invitation complete.