For reference, i am a size UK 14. i have quite muscley calves, quads and hamstrings but also a bit of a belly on me! i ordered the size 32 and 33. the 32 fit really nicely, fitted snug around my hips, bum, legs and did fit at the waist but was a bit snug when sitting down. I hear mixed things about whether they will stretch out - some say they will but only by half an inch. not sure if that will make them more comfortable or just the same! T4100 is designed to snap the material back into place if it does stretch. The 33 gives me a baggier more casual look and is that little bit more comfortable. for those who weight train and got leg gains, these are such a good pair of straight leg jeans. because they are straight/wide leg they actually look like straight leg on me. i find the no stretch/structured material flattering especially around my middle.