What is Size 40 in UK Clothes? Women’s, Men’s, Shoe Guide

Women’s EU 40 (shoes): UK 6.5–7 · Men’s EU 40 (shoes): UK 6.5 · Women’s EU 40 (clothing): UK 12 · Foot length: ~25 cm (9.8 in)

Why EU 40 Is Usually a UK 12, Not 14

A common myth is that EU 40 in women’s clothing equals a UK 14. That confusion comes from cross-referencing shoe charts or older European conversion tables. In modern apparel sizing, EU 40 maps to a UK 12 across most British and Irish retailers, including ASOS and Dubarry.

The reason EU 40 isn’t a UK 14 is that clothing sizes use body girth measurements (bust, waist, hips) rather than the length-based system used for shoes. A UK 14 typically corresponds to an EU 42 in women’s clothing, not EU 40.

Women’s Clothing: EU 40 to UK 12

When you’re buying dresses, tops, or trousers, EU 40 reliably converts to a UK 12 for most women’s brands. Dubarry’s official size guide maps EU 40 to UK 12 with a bust measurement of 97 cm and waist of 79 cm — a slightly larger fit than the average 92 cm bust standard. ASOS’s chart aligns EU 40 with UK 12 for dresses and tops, and Komodo’s sizing uses the same equivalence.

For context, a UK 14 in women’s clothing maps to EU 42, not EU 40. If you’re between sizes, a UK 12 fits when your bust measures 90–94 cm; size up to EU 42 only if you’re closer to 96 cm, not as a default fallback.

Women’s Shoes: EU 40 to UK 6.5 or 7

For women’s footwear, EU 40 most commonly converts to UK 6.5, based on a 25 cm foot length. However, some retailers list it as UK 7. This isn’t a contradiction — it’s a difference in how much “wiggle room” the brand builds into its last (the foot-shaped mold used to make the shoe).

The takeaway here is that 25 cm is your magic number — if your foot measures exactly that, you’re an EU 40, and the UK label (6.5 vs 7) is just a brand preference for how much wiggle room they build in.

Men’s Shoes: EU 40 to UK 6.5 — With a Catch

Men’s EU 40 is less standardized than women’s, because the European system wasn’t designed with a strong gender split — the same 25 cm foot length appears across charts, but the UK equivalent shifts based on how the brand drafts its male lasts. Shoesizecomparison.co.uk, for instance, lists men’s EU 40 with a foot length of 25.5 cm, which would push the UK equivalent to 6.0 rather than 6.5.

This is where a foot measurement saves you again: 25 cm (or 9.8 inches) is the EU 40 length, regardless of gender, so check the brand’s own cm guide. If a brand assumes a 25.5 cm foot for men’s EU 40, that’s a signal they expect a slightly larger foot — order accordingly.

Children’s and Unisex Sizing: EU 40 Is Rare but Consistent

Children’s EU 40 exists but is rare — most kids max out around EU 36–38 before transitioning to adult sizes — yet when you see it, the conversion to UK sizes follows the same 25 cm rule. The European system doesn’t distinguish between adult and child foot lengths, so a child’s EU 40 is the same physical size as an adult’s EU 40, which is why some teens end up in “women’s” sizes without noticing.

For unisex footwear, the gender split essentially disappears: EU 40 is UK 6.5 regardless of whether the shoe is marketed to men, women, or kids, because the foot length is identical. Shoe Carnival’s chart reinforces this by showing EU 40 as a UK 6.5 across gender categories, but reminds shoppers that “width varies by style.”

US Equivalents: What EU 40 Means Across the Atlantic

Americans often ask how EU 40 maps to US sizes, and the answer changes your expectations: women’s EU 40 typically equals US 9, while men’s EU 40 is US 7 — a difference that mirrors the UK half-size split. This cross-reference matters because many shoppers use US charts as a mental shortcut, only to get tripped up by the same gender caveats.

Foot Locker UK adds that these US equivalents correspond to the same 25 cm foot length. The conversion is more intuitive in the US because the sizing system was derived from the same foot-length basis as the EU — just with different increments — so EU 40 consistently means a medium foot size in both markets.

When EU 40 Maps to UK 7 Instead of 6.5

Some brands — particularly those using a wider last or a more generous fit philosophy — will list EU 40 as a UK 7. This is common in comfort footwear brands, hiking boots, and some sneaker lines where extra toe room is a feature. Foot Locker UK’s own guide shows EU 40 in the UK 6.5–7 range depending on the style.

So when you see a UK 7 for EU 40, it’s not an error — it’s the brand signaling “you’ll have a little breathing room.” If you’re between sizes, that’s the one to choose.

How to Measure Your Foot for EU 40

Measuring your foot is straightforward: place your heel against a wall, mark the longest toe’s tip on a piece of paper, then measure the distance in centimeters. If you measure 25 cm (9.8 in), you’re an EU 40. Do this at the end of the day when feet are slightly swollen for the most accurate result.

For width, measure the widest part of your foot. If it exceeds 10 cm, consider a wide-fit version even if the length matches EU 40.

This method works universally because EU sizing is purely length-based, unlike UK sizing which can vary by a half-size depending on the last. Once you know your foot is 25 cm, EU 40 becomes your universal size — the only question left is whether you want a snug UK 6.5 or a relaxed UK 7.

EU 40 Conversion Chart: Shoes vs. Clothing (Women’s, Men’s, Kids)

The implication: EU 40 is a “medium” in shoes (UK 6.5) but a “medium-large” in women’s clothing (UK 12), which means the same person will wear a different UK size depending on what they’re buying.

Brand-Specific Variations and Why Charts Disagree

Retailers and size-guide specialists all converge on the same core truth: EU 40 is a length-based size that maps cleanly to 25 cm, but the UK label varies by category and brand philosophy. ASOS lists EU 40 as UK 12 for women’s clothing and UK 6.5 for women’s shoes. Dubarry’s clothing chart also says UK 12 but uses slightly larger body measurements. Shoesizecomparison.co.uk assigns 25 cm for women’s EU 40 but 25.5 cm for men’s EU 40 — a distinction that shifts the UK equivalent.

These aren’t errors; they’re different drafting standards. European sizing is nominally standardized, but each brand adjusts for its target customer’s typical foot shape or body proportions.

Practical Tips for Shopping EU 40 Across Categories

• Measure, don’t guess: A 25 cm foot is EU 40 in shoes, regardless of gender or brand.
• Read the category label: EU 40 in clothing means UK 12 (women’s), not UK 6.5 — they’re completely different scales.
• Check the brand’s own chart: If the retailer lists EU 40 as UK 7, that’s their fit philosophy, not a mistake.
• Heed: Foot Locker UK reminds that your actual foot length, not the chart, is the final arbiter of fit.

Related reading: **Double Duvet Size in cm: UK & Ireland Standard Dimensions**

Frequently Asked Questions

Sources and Further Reading

• Foot Locker UK — EU/UK/US Shoe Size Guide
• Shoe Carnival — Size Chart and Width Guide
• Dubarry Official Size Guide (women’s clothing: EU 40 → UK 12, bust 97 cm, waist 79 cm)
• Shoesizecomparison.co.uk (EU 40 women’s foot: 25 cm; men’s foot: 25.5 cm)
• ASOS Size Guide (EU 40 → UK 12 women’s clothing; UK 6.5 women’s shoes)