I hope that you don't plan to wear that 4" belt buckle around your waist? Try bending over and have that buckle *** you in the abdomen. It ain't fun. And a 4 " wide belt aint much better.
IMHO, 2" is plenty.
Just had a thought. Try some of the high fashion designer web pages. Those large belt buckles are popular in womens fasion.
A 4" buckle might work well enough to cinch a horse, or a really big women, but most of us aint that big. :haha:
J.D.