have a shoemaker /cobbler...
disengage the buckle if it doesn't already detach from strap. He should add a similar color, weight, and sized material to end. This should approximate the 4 inches you need to add. He can shave down the thickness of the back of your original belt (maintaining the surface appearance). He will also shave down the front of the new piece and glue the two together. If he's any good, he'll probably add a thin piece of lining leather to the back side as well just to smooth the edges as well. Add a bit of sewing from him for strength and Voila!
When he reattaches the buckle, the mismatched added piece of leather will be hidden by the overlapping original leather at the point where the loops are !
I'v done it...and it works!
disengage the buckle if it doesn't already detach from strap. He should add a similar color, weight, and sized material to end. This should approximate the 4 inches you need to add. He can shave down the thickness of the back of your original belt (maintaining the surface appearance). He will also shave down the front of the new piece and glue the two together. If he's any good, he'll probably add a thin piece of lining leather to the back side as well just to smooth the edges as well. Add a bit of sewing from him for strength and Voila!
When he reattaches the buckle, the mismatched added piece of leather will be hidden by the overlapping original leather at the point where the loops are !
I'v done it...and it works!