It's legit. I've seen fake Brioni with that label style, but the stitching around the label looked like it was applied by a glue-addled eight year old. If it's close to fitting, and you usually find it hard to find suits, I'd get it altered and wear it with pride. Otherwise, flip it for a decent profit, and plough the money back into something that does fit.
1/9/11 at 1:20pm