Just got a pair of ST-100X from Blue Owl. They seem very tight in the waist and thigh. I normally wear Levi's 31, which requires a belt. I got a 29 and had severe trouble getting them buttoned. As it is I'm half afraid to put my boots on in case they explode. Just wondering how normal this is or if I should go up a size? I don't want to end up with a pair too big for me either.