That's kinda a personal question, don't you think? I don't think ALL are about the same, and I must admit mine is not quite 11 inches. I'll measure mine the next time it's at its maximum, but it might be awhile since I'm not as young as I used to be.
However, my LSD2 is 29 cm (11.25 in) long without its shockmount, and 34 cm (13.5 in) long in its shockmount.