What Size Am I in M&S? The Ultimate M&S Sizing Guide

Marks & Spencer (M&S) remains one of the UK’s most trusted clothing retailers, known for its dependable fit, classic silhouettes, and evolving modern collections. But despite their reputation, M&S sizing can vary considerably across product ranges, fits, and materials. This post breaks down how M&S sizing works, what to watch for, and how to find your exact size across categories—without ever guessing.

1. How Does M&S Sizing Work?

M&S uses standard UK sizing conventions, but with some critical differences depending on:

• Fit type (Regular, Petite, Long)

• Cut (e.g., Slim Fit, Relaxed, Straight)

• Product line (e.g., Autograph, Per Una, Collection)

• Garment type (e.g., jeans, knitwear, formalwear)

General Size Chart (Women’s Clothing)

Note: M&S sizing is generally true to UK size, but some pieces (especially jeans and formalwear) can run slightly large due to generous ease for comfort.

2. M&S Fit Types Explained

🌿 Regular Fit

The default M&S fit—cut to accommodate average proportions. Regular is ideal for most women under 5'6" to 5'8".

✂️ Petite Fit

Designed for those under 5'3", with shorter torsos, rise, and hemlines. It’s not just a hem crop—the whole garment is proportioned differently.

📏 Long Fit

Suited to heights over 5’9”, with longer leg lengths, longer arms, and extra bodice length.

🧵 Fit Variations by Category

• Jeans & trousers: Available in Short, Regular, and Long leg lengths.

• Blazers & coats: Often Regular fit, but size down if between sizes (especially in double-breasted styles).

• Dresses: Petite range fits better in the shoulder and torso if you’re under 5'3".

3. M&S Jeans & Trousers Sizing

M&S offers waist + leg sizing in some jeans (e.g., 10 Short / 10 Regular / 10 Long), especially in Per Una and Autograph ranges.

Best Fit Tips:

• High-waisted styles like “The Mom Jean” may feel snug—go up a size if curvier through hips.

• Slim or sculpting fits (like Ivy or Lily) often include elastane—stick to your normal size unless between.

• Wide-leg or soft tailored trousers are often cut generously—consider sizing down for a closer fit.

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Final Word

M&S sizing is consistent in principle but variable in practice. Each collection, fabric, and garment type fits differently. Rather than guess, measure once and let Tellar.co.uk handle the rest. Whether you’re buying from Per Una or Autograph, jeans or dresses—Tellar tells you your real M&S size.

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