Straps are 15" apart. There are strap loops on both side so the scabbard can ride right side butt forward or left side butt to the rear and show the tooling or if a cowboy likes the plain side out he can let it ride on the left side butt forward or the right side butt to the rear. I was originally asked to make this by a guy who said he liked to use two different saddles. One plain and one basketweave.
The overall length is approximately 30 inches.
I made it to fit rifles such as the 92,73,66,94 etc that have a 20" barrel or so. Of course it would accommodate shorter barrel rifles 16" and 18" barrels also.
24" barrels are a little to longer for it.
Hope this helps.