I love the styling of these jeans, but for some unknown reason the M5 gambler style ran small on me.  I have the M5 rebar and dead run jeans in size 30W X 32L and they fit great.  These I sent back and bought a 31W X 32L and they fit like my other two pair.  If you've never had a pair of Ariat jeans I highly recommend you try a pair out.