I'm not sure the exact measurements on mine, but it's much smaller in the front, probably a couple inches or so.
I have a small frame/waist, and the 4 inch belt all the way around bruised the hell out of my ribs!
I started the taper at the side of my waist.
At that time, they would make it any way you wanted it.
It may be worth a try if you think she'll be lifting for long enough for you to recoup your investment.