I am 180 cm tall with average hip width and leg length. Since I bought JOEX version of it at the store I knew that my size for top is 4.5, however for JNEX (the blue version) I tried on at the local store and 4.5 was very wide and big (although on JOEX white one it was juat fine). So I ordered half size smaller and it fit well - for a waist size of 34 I ordered 4 (no letters) and it fits well. The quality is good and corresponds to the expensiveness of the pants (it is quite expensive though). Didn’t see any issues with it. Stitches seem to be fine and overall build quality is good.