How big breast from 12lb turkey?

[kamp]

I have a turkey that is 12 lbs. I am planing to cut the breast off but I wonder how many lbs could they be?

One time I found a recipe chart that said roasting time for turkey breast and drumstick. It said "XX lbs breast from 10-12 lbs turkey, XX lbs breast from 8-10 lbs turkey".

Thanks!