I bought size 34 because my other trousers and jeans are 36's and too baggy.  When I'm fit and eating healthily, regular 34's are fine though sometimes pinch my waist.  These stretchy Dockers have two elastic panels, each about an inch long.  It's just enough stretchiness to keep me comfortable if I gain a pound or two.  And the fabric is very soft to the touch, but nevertheless as sturdy as khakis.