I have a 34" waist. I tried on a pair of Wrangles in a store. The 34" fit was just right but them being 100% cotton I knew they would shrink over time, even if never washed in hot water. I ordered these 34s with a flex waist thinking they would be just the thing. Wrong, they are marked 34 but larger than my old 36's that have shrunk. You may get lucky and the size of the jeans may actually be the size on the label. No matter what Amazon says it's a pain the the ass to send items back but I can't wear them. The one star is based strictly on fit. If they don't fit nothing else matters.
I'm so frustrated by the lack of standardization in the sizes of men's clothes. I can understand different brands fitting differently but a regular straight fit should fit the same across the product line.