The Ruger SR9 full size measures 7.6 inches in length with a 4.1-inch barrel. Whereas the SR9C is a more compact version with an overall length of 6.85 inches with a 3.5-inch barrel. The SR9 is a full-sized handgun and the SR9C is a compact handgun. Both conceal very well with the right setup, albeit the SR9C is slightly better.