Blackhawk Sizes ~ Holster Fit

[ShortBBL]

I'm curious if anyone has frame and cylinder size charts or info on the different Blackhawks. I am making holsters and right now only have a Lipsey's 44 Special 4 5/8", a Single Six (New Model) 4 5/8" and a 45 Colt with 5.5" bbl. I am wondering if the 45 Colt version is the exact size as the 41 and 357 in 5.5" or if maybe the 45 is a little bigger?

Thanks!