All mine are M&S and not bought any for many years as they just last so well…
Exactly right. I always buy M&S cotton-rich sport socks in black. Matching isn’t quite as easy as one might think, because M&S have changed the actual structure a couple of times over the years, so they’re not identical – as I still have some that are at least ten years old, if not older, there’s a bit more to matching pairs up, something that my g/f grumbles about! I’ve got one orphan sock that I can’t find it’s twin, but it’ll turn up eventually.
I think I buy a new pack every year, then bin any that have gone threadbare at the heel, but I don’t need to do that this year. 😁