Is your belt a gun belt? I know some manufacturers make 1.25" gun belts. But really, if you have no need for the 1.25" belt (some people do...they need to carry and look dressy, etc) get a 1.5". That's really the minimum for a sturdy platform for your gun. Stay away from the department store when looking for gun belts. If you can fold part of the belt in half the long way, it's not nearly sturdy enough.
They make several styles of gun belt. They even have a 1.25" variety, if you need it. It's made out of horsehide, which is heavier duty (and more expensive) than cowhide. I have one of their regular 1.5" cowhide belts and it works great.