As I have worked for 5 Years in the retail trade (USC and D2), I have a wide knowledge of clothing styles, sizes e.t.c. Both through my own personal experience and through selling these brands, I have come to the conclusion that hey are smaller made. For example I usually take a MEDIUM in my T-Shirts and 32" waist in Jeans (E.G.TOPMAN, BURTONS AND D2). For some reason GSTAR and DIESEL I tend to take a LARGE and 33/34" Waist and as people are not actually getting the chance to try things on through ebay and sellers aren't quite clear about this sizing difference, I though I'd write this review to let people know if it's their first time buying any of these brands.
I hope this was of some use, thanks for taking the time out to read this guide