IME with Mark's sizing I wear anything between a 32" and a 34" waist med/large, but their sizes are all over the place these days, t'was a time when you could guarantee their sizes would always fit, not so nowadays, but the quality is reasonably constant.
As for next, can't say I'm overly impressed, purchased a pair of shoes once, they fell apart within a month, serves me right for abandoning my own common sense and not buying from Clarks as I usually do.
As for the 'other' size issue, never had any complaints
Has anyone noticed how M & S sizes are bigger than anyone else's? A 30" M & S waist is 34" at Next.[/quote]
I've even got a 'small' merino jersey from M&S. If I shop at next it's XL for me. I know that's a huge difference, but they both seem extreme, I'm pretty average 5'8" and 12.5 stone, surely that'sa medium.