Generally:
A Weight: 15/16" at breech
B: 1" at breech
C: 1-1/16" at breech
D: 1-1/8"
Within the same profile, other dimensions will be in proportion - the waist will get thicker in 1/16" increments; same with the muzzle. Different profiles, particularly with Rice, may more or less swamp for a given length, which will change the balance point a bit for a given weight and caliber, and may be more or historically accurate for a given build.
Incidentally, not everyone wants a barrel with the balance point as far back as possible - I have a Getz b-weight 44" in .50 on my rifle, and while it is a dream to carry it it is a pill to hold steady off-hand. Next rifle I build will be considerably heavier, both because I like the feeling of a heavy rifle and because it seems like most originals were considerably stouter than current fashion. You really need a C-weight or heavier for a Pre-Rev rifle for decent architecture, and I note that George Hanger claimed that the average weight of Revolutionary-era longrifle was 6 pounds, 3-4 ounces in the barrel. A Rice D-weight 44" in .50 caliber is just a few ounces heavier than that, and while most folks would consider such a combination insane, I think it is probably fairly close to what a typical longrifle barrel from that period would handle like when new.