If you're 6" around, your math is terrible if you think something with a 1.25" diameter will fit you.

Circumference = pi x diameter
Circumference = approx. 3.14 x 1.25"
Circumference = 3.93"

Ouch. That's tighter than a regular; probably the size of a Snugger Fit.

I have a 6" girth too, go for Magnum XL's if you want the best fit.