This large rectangular buckle is suitable for a heavy belt just under 1.5 inches wide. It weighs over 60 g and so is really chunky. It has large featured hallmarks. You will need to find a leatherworker who could provide and fit the leather.

This buckle is cast in a cuttlefish bone which gives it a unique surface patterning. It weighs just under 30g and is fully hallmarked. The buckle would take 30mm leather. You will need to find a leatherworker who could provide and fit the leather. There's a similar, but rectangular version on my blog.