Does M&S Run Small? Everything You Need To Know About Their Sizes

The British brand's sizing explained.

Last Updated on December 12, 2022

Shopping online at Marks and Spencer? If you’ve never bought something from the brand before or just want to ensure you buy the right fit, we’re explaining everything you need to know about the brand’s sizing right here.

It’s fair to say that M&S is one of the most popular brands on the British high street, whether you’re a fan of their lingerie department, or love their cute winter knitwear.

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Need something appropriate for your office job? Just get a blazer from Marks and Spencer. Want to celebrate the holiday cheer with a stylish Christmas jumper? Oh, you’ll love their simple yet chic holiday jumpers.

Woman wearing Marks and Spencer star patterned long sleeve blouse

I love M&S, but like most high-street brands, their sizes can be a little inconsistent. To help you out, here’s everything you need to know about Marks and Spencer’s sizes.

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Does Marks & Spencer sizing come up small?

Some people find M&S to be quite true to size, especially with their dresses and tops, while others find their regular fits to be a little loose and generous, but not extreme enough for you to size down quite often.

One thing people do complain about is the length of their cuts, especially their dresses and trousers. If you’re petite or on the shorter side, there’s a possibility they will run long.

You may have to get a size down from your usual size when buying trousers or jeans. In their size chart, their regular/standard length for trousers and jeans are designed to fit a 31″ inside leg.

woman wearing Marks and Spencer striped shirt and slim-fit jeans

M&S also has a disclamier that most of their items were designed for a women whose height is 5ft 6″ (168cm) and the length of their trousers vary according to style.

For their petite options it mentions they’re designed for 5ft 3″ (160 cm), but a few of petite shoppers still find their trousers or dresses too long—especially when they didn’t intend to buy a maxi.

If you’re in between sizes, it’s advised you size down.

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What size do Marks & Spencer models wear?

M&S mentions the size of the clothes the model is wearing and their height as well. Since many people seem to have more of a length issue with their clothes, the model’s height will give you an idea of how a certain size will look.

Of course, we all have different body types, and what fits the model may hang differently on you – especially as stylists are often on hand to pin and clip the model’s clothes so they look their best.

Do Marks & Spencer coats run big or small?

Their coats run quite large, especially if you’re petite. Some M&S shoppers had to size down twice to find a coat with the right fit and length.

Regarding coats, a little room is recommended when you’re layering it over a cardigan or jumper, but if you prefer a sleek, fitted look, you need to size down from your usual.

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Woman wearing coat from Marks and Spencer

Marks and Spencer bra size guide

There is a common theme with M&S and their sizes—they’re far too generous. Oversized fits are fine if you’re buying a top or a jacket, but when it comes to undergarments, it’s a different story.

In this Reddit thread, many users shared similar sentiments on how M&S has inconsistent sizing regarding their bras. Either the bands run small, or the cup runs large, and vice versa.

When it comes to bras and undergarments, it’s best to go their physical store to find the right size. They also have really friendly staff who’d be happy to help.

But if you’re too busy or prefer to shop online, M&S has a comprehensive size guide for their bra sizes. They provide UK sizes between 28AA to 46K.

For knickers and nightwear, people seem to agree that they’re quite true to size.

Marks and Spencer size guide

You can find their size guide here. They provide measurements in both centimeters and inches.

Marks and Spencer also gives a detailed disclaimer for each category, including most of their pieces’ standard length and fit.