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M&S jeans? What’s with these sizes?

41 replies

HellybellyMelly · 08/03/2026 02:56

Hi all, usually an EVA 16 / 18, tried out the mom and boyfriend jeans and could barely get them over my bum let alone zip up. Is there something vastly different between the types?

OP posts:
BigBrownBoogyingBear · 08/03/2026 07:59

People on these threads always say M&S have large sizing. I think it must depend on your body type.

I'm 5ft 6. 8 stone 4. Short body and long legs.

I haven't been able to fit into an M&S 8 for years. The jeans are SO high waisted that they fasten in a very weird place on my body - over the wide part of my ribs and nowhere near my waist. I have M&S size 8s from the 2000s that are lower rise and fit perfectly.

I tried on a couple of tops in there the other day and the 10 was unflatteringly clingy. Although that was maybe the fault of the material!

So I agree that the sizing isn't particularly standard or comparable to other shops and would say this isn't always down to vanity sizing!

Pooky001 · 08/03/2026 08:24

Another person glad to read this! I bought some washed black jeans from there recently and had to size up which I’ve never had to before in m&s. If anything they would be a bit loose. Assumed it was me!

Gettingbysomehow · 08/03/2026 08:29

Weird I have the opposite problem. I always had a size 12 now need a 10 in everything from Marks and my weight hasnt changed. Its exactly the same.

goz · 08/03/2026 08:31

Pooky001 · 08/03/2026 08:24

Another person glad to read this! I bought some washed black jeans from there recently and had to size up which I’ve never had to before in m&s. If anything they would be a bit loose. Assumed it was me!

The dying process for black jeans vs blue denim generally makes them fit stiffer and therefore tighter.

SavoySteam · 08/03/2026 08:34

I'm sure they've re-worked their sizing. I used to be 14 in their jeans - I could pick up a pair of Sienna without trying them on. Now I have to get size 16. When I compared them side by side - the new 16 was smaller than the old 14.

Nitgel · 08/03/2026 08:35

I sized up in the Eva to s 16. Am 32w 30l in Levi. They fit so much better but I have to use a belt. I think in time they may shrink s bit but the 14 was too tight. Apart from that they're great.

ItsStillWork · 08/03/2026 08:38

I don’t think it’s just M&S, sizing is terrible in all stores.

i have size 8 Ted Baker pjs, but size 14 knickers from Next.

some stuff I have is a size 10 and yet other clothing is a 14 even from the same shop.

buy some jeans from M&S, think oh yeah I like these so you order more within the same week…

they come and they are not the same fit or the same leg size etc .

i have to buy multiple sizes of everything and return loads of stuff

Toastersandkettles · 08/03/2026 08:38

I'm anywhere between a 12-18 in M&S. I find that even the same style jeans but different colour might not fit me in just one size.

Passingthrough123 · 08/03/2026 09:04

goz · 08/03/2026 08:31

The dying process for black jeans vs blue denim generally makes them fit stiffer and therefore tighter.

Yes, I have the Eva jeans in mid-blue and dark indigo and the latter are so stiff they can only be worn on days when I haven’t eaten anything more substantial than lettuce.

StockSA · 21/07/2026 12:30

Just bought the Flare High Rise in a 14 (my normal size in the EVA style) - too tight giving a camel toe even WTA !! Sick of this - happened in Zara few years back

Plutoplutopluto · 21/07/2026 12:33

I tried some jeans on in store the other day. Tried a size 12 didn't fit in one style (couldn't even get the zip up) yet 12 fit perfectly in a different style. I think it was because one was high waisted and the other mid. But it's such a big difference! I also find I need the longer length in m&s despite me being average height! They are just too short.

AgathyCrusty · 21/07/2026 12:54

The sizes are all over the shop I bought the Mom jeans recently in my size (14) and after a morning’s wear they were so stretched and baggy they looked horrendous. I’ve bought the 12 which are a tight fit but after sitting in them for a bit they are perfect! Same with their cotton chinos!

OwlCalledSage · 21/07/2026 12:57

Same here. Bought the cream barrel legs in 12 and they are slightly loose, as I’d wanted and expected. Bought the same jeans in black in a 12 and they’re absolutely huge.

beadystar · 21/07/2026 13:44

I brought two sizes of the same M&S jeans into the the cubicle to try on. The smaller size was bigger than the larger. It’s been known for a while that their sizing is batshit.

momager22 · 21/07/2026 14:51

They usually come up smaller if the fly zip isn’t long (so can’t open up to pull over big thighs/ bum) or if there’s no elastane in the fabric

Koulibiak · 21/07/2026 16:08

Passingthrough123 · 08/03/2026 09:04

Yes, I have the Eva jeans in mid-blue and dark indigo and the latter are so stiff they can only be worn on days when I haven’t eaten anything more substantial than lettuce.

I have the Eva in indigo and they fit perfectly, I don’t find them too stiff. I waited forever for a lighter colour to be back in stock, and when they arrived they were about 4 inches longer than the (identically sized) Indigo ones. I had to return them, bought Levi’s instead.

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