I don't understand pants/shreddies/grundies sizing.
Anything larger than Medium doesn't provide adequate nad support and Sir prefers to dress to the left, not all over the place. However, Medium or smaller wears out faster, with elastic showing within a few washes. Sexy. Maybe I should buy better scads than Sainsbury's.
Also, socks labelled 9-12 are basically 8 after the first wash. As someone with size 10/11 feet, this is a problem.