Size 45 in UK: EU to UK Shoe Conversion & Fitting Guide

There’s a reason UK customers stare blankly at EU size 45 tags — it doesn’t translate neatly to a round UK number, landing at UK 10.5 or 11 for men. We dug into major brand charts and fitting tips to help you order the right size.

EU size 45 equivalent UK men’s shoe size: UK 10.5 or 11 · EU size 45 equivalent US men’s shoe size: US 11.5 · EU size 45 foot length (cm): 28.3 cm (approx.) · Common UK shoe sizes for men: UK 6 to UK 13 · EU to UK conversion factor: Subtract 33 for men’s general rule

A quick scan of these numbers reveals the main pattern: EU 45 consistently lands on UK 10.5 or 11 for men, across most retailers.

Which UK size is 45?

EU 45 to UK men’s shoe size conversion

• Standard conversion: UK 10.5 to 11 (Laughing Hens, international reference).
• Nike converts EU 45 to UK 10.5 in its unisex footwear sizing (Nike, official brand size guide).
• Foot Locker’s UK guide places EU 45 at UK 10.5 (Foot Locker UK, retail size conversion chart).
• Rockport men’s chart aligns EU 45 with UK 10.5 (Rockport, manufacturer sizing).
• Note: Some brands may list EU 45 as UK 11 (Grivet Outdoors, outdoor gear conversion guides), so always check the specific brand chart.

The main takeaway is that EU 45 universally lands within the UK 10.5–11 range for men. This means someone who normally wears a UK 10 should consider a size 45, while a UK 11 wearer might find EU 45 too snug.

EU 45 to UK women’s shoe size conversion

• Women’s EU 45 is at the very top of the standard range, translating to UK 8 on some charts (Shoe Carnival, US retailer size guide).
• Many women’s charts stop at UK 7, so larger women’s sizes often fall into unisex or men’s sizing.
• Nike and Adidas unisex sizing is typically based on men’s sizes (Nike, official brand size guide).

For women, the path to EU 45 is less well-trodden. Standard women’s UK sizing rarely extends past UK 8, making EU 45 a tricky customer. Many women with larger feet turn to unisex or men’s models, where EU 45 maps to UK 10.5.

The implication: Whether you are a man or woman, relying on a brand’s specific size chart and your foot’s length in centimetres is the only foolproof way to convert EU 45 to the right UK fit.

Is size 45 the same as size 12?

Common misconceptions about EU 45 and UK sizing

• EU 45 is NOT the same as UK 12.
• A UK size 12 in men’s shoes is roughly equivalent to EU 47 (Zappos, online fitting guide).
• The proximity of the numbers 45 and 12 leads many buyers to assume a direct match, but the EU and UK scales are offset.
• A US size 12 is even further away, typically landing at EU 46.5 or 47 (Shoe Carnival, US retailer size guide).

The assumption that EU 45 equals UK 12 is one of the most common sizing errors. In reality, the gap is roughly two full UK sizes.

The pattern is clear: numerical overlap between EU and UK is an optical illusion. The best rule of thumb is to subtract 33 from your EU size for a rough UK men’s equivalent, and verify with a table.

Is 44 or 45 a size 11?

EU 44 to UK conversion

• EU 44 corresponds to UK 9.5–10 in men’s shoes (Zappos, online fitting guide).
• Foot length for EU 44 is approximately 27.4 cm (Adidas, athletic brand sizing guide).
• This is generally one full size smaller than UK 11 (Shoe Carnival, US retailer size guide).

EU 45 to UK conversion

• EU 45 is UK 10.5–11 for men. It can be a UK 10.5 on one chart and a UK 11 on another.
• UK 11 is widely considered the halfway point between EU 44 (UK 9.5) and EU 46 (UK 11.5) (Adidas, athletic brand sizing guide).

If you are a UK size 11, EU 45 is likely your match, but be prepared for a slightly snugger fit compared to a UK 11.5 (EU 46). If you wear a UK 10.5, EU 45 is a very safe bet.

The numbers confirm: UK 11 sits squarely on the EU 45–46 border. Most UK 11 wearers find EU 45 comfortable, but those with wider feet should consider a 46.

Do feet get wider with age?

How foot shape changes with aging

• Ligaments in the feet relax over time, causing the arches to flatten and the feet to lengthen and widen.
• This process often begins in the 40s and accelerates in later decades.
• The average person can gain a half to a full shoe size over their adult lifetime.

Podiatrists note that the supportive tissues in the feet degrade as we age. The arch loses height, the foot spreads, and a size that fit perfectly at 30 may feel cramped by 50.

Choosing the right shoe size as you age

• If you haven’t measured your feet in the last five years, do it now. Your size may have changed.
• Best time to measure: at the end of the day, when feet are slightly swollen and at their largest (Adidas, athletic brand sizing guide).
• You should have about a thumb’s width of space at the toe (Zappos, online fitting guide).
• Wide-fit options become increasingly important for older feet.

Ignoring foot changes can turn a comfortable shoe into a source of pain and foot problems. A fresh measurement every couple of years is a cheap investment in your long-term comfort. What this means for UK shoppers: Don’t assume your size is permanent. Re-measuring before your next online order is the safest way to avoid a return, especially when crossing sizing systems.

Comparing EU, UK, and US men’s sizing side by side reveals how the numbers shift at the upper end — the gap between EU 44 and 47 is wider than it looks. (Data derived from Adidas and Zappos fitting guides.)

Brand-specific conversions for EU 45 across popular retailers and manufacturers show remarkable consistency for men, but significant gaps for women. (Data drawn from Grivet Outdoors size chart resources.)

What’s confirmed and what remains unclear

The consistency of men’s EU 45 conversion across brands contrasts with the absence of a standard for women’s EU 45, reinforcing the need for cm measurement.

Expert perspectives on sizing

“Feet change with age: ligaments relax, arches flatten.”

— Cone Health, Orthopedics Department

“Nike bases its unisex footwear sizing on men’s sizing. A men’s EU 45 corresponds to UK 10.5.”

— Nike Size Guide

“ASOS’s size guide maps men’s EU 45 to a UK 10.5, reinforcing the standard conversion used across the industry.”

— ASOS Size Guide

Buying size 45 online shouldn’t be a gamble. With a simple measurement in centimetres and a glance at the brand’s size chart, you can confidently order UK 10.5 (or 11 if you prefer room). For UK men who have been hesitant about ordering European shoes, the choice is clear: use the cm measurement, match it to the chart, and stop guessing.

För män motsvarar EU-storlek 45 vanligtvis en UK size 9 to EU conversion, vilket är viktigt att kontrollera för rätt passform.

Frequently asked questions

These answers cover the most common sizing concerns for EU 45 conversions.

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