Essential Marks and Spencer Bra Size Guide | UK & International Conversions

Marks & Spencer Bra Size Guide – UK to International Band Sizes

Marks & Spencer bras use UK underband sizing. Use the size chart below to check UK and international conversions.

Marks & Spencer Bra Size Guide – UK to International Cup Sizes

Compare UK cup sizes with international equivalents for the perfect fit across regions:

Marks & Spencer Brief Size Guide – UK & International Brief Sizes

Marks & Spencer knickers are sized using both single UK dress sizes and dual UK sizes. Use the charts below to compare UK sizes with letter sizes, body measurements and international equivalents.

Single UK Size Knickers – UK Size, Letter Size, Waist & Hips (inches)

Dual UK Size Knickers – Dual Size, Letter Size, Waist & Hips (inches)

International Knicker Size Conversion – UK to Europe, Italy, Russia & US

Marks & Spencer Bra Buying Advice

• Confirm your base size: Start by measuring your underbust and bust, then use our Bra Size Calculator to confirm your current UK size before choosing Marks & Spencer styles.
• Check band and cup balance: Once you know your band and cup, use the Marks & Spencer band and cup availability chart above to see which sizes are made in your range.
• Compare across brands: If you already wear other brands, you can use the Bra Size Converter to line up your usual UK size with Marks & Spencer and other UK-based brands.
• Use fit checks: After choosing a bra, follow the simple steps on our Bra Fitting Advice page to assess band firmness, cup coverage and strap adjustment.
• Match briefs and knickers: Use the Marks & Spencer brief size charts above to match your usual UK dress size or international size so your bra and knickers fit comfortably together.

Compare Marks & Spencer With Other UK Brands

Marks & Spencer uses a UK band-and-cup sizing system, making it easy to compare with other UK lingerie brands. To understand how size ranges and styles vary across brands, use our Bra Size Converter alongside the individual brand size guides and our Bra Fitting Advice.

• Triumph Bra Size Guide – long-established UK-style sizing with a wide everyday and comfort range.
• Playtex Bra Size Guide – supportive shaping and classic designs using a UK-based sizing structure.
• Sloggi Bra Size Guide – known for comfort-led wireless styles and modern everyday fits.
• Freya Bra Size Guide – fashion-led UK sizing brand offering a wide D+ size range.
• Wacoal Bra Size Guide – refined designs with UK sizing across many styles.

For direct brand-to-brand size matching, visit the Bra Size Converter.

Marks & Spencer FAQs

Q: How do I find my Marks & Spencer bra size?
A: Measure your underband and bust and enter them into our Bra Size Calculator. For step-by-step measuring and fit checks, visit our Bra Fitting Advice. Then use the size charts above to match your measurements to Marks & Spencer sizes.

Q: Does Marks & Spencer sizing match other UK brands?
A: Marks & Spencer uses a UK band-and-cup sizing system, but their cup progression is unique. Unlike most UK fuller-bust brands, M&S follow a traditional sequence up to G, include a GG cup, then return to the traditional progression beyond that. This means cup letters do not always line up directly with brands such as Panache, Freya or Elomi. To compare sizes, use our Bra Size Converter and the individual brand size guides.

Q: Can I use this guide for Marks & Spencer swimwear?
A: Many Marks & Spencer swim styles follow a similar sizing approach to their lingerie. Always check the product description and use the charts above as a starting point.

Q: Where can I find official Marks & Spencer information and collections?
A: Visit the Official Marks & Spencer Website alongside our size charts, Bra Fitting Advice and Bra Size Converter.