38 in UK Size: Shoes & Clothes US EU Charts

Size 38 can mean three completely different things depending on whether you’re buying shoes or clothes. That confusion is exactly why this guide exists. EU 38 converts to UK 5 for women’s shoes and US 7.5, but for garments it means something else entirely. Foot length for a true EU 38 is roughly 237–246 mm, and that single-centimetre gap is where most sizing errors happen.

EU 38 Men’s US Shoe Size: 7.5 · EU 38 UK Women’s Shoe Size: 5 · EU 38 Foot Length: 237–246 mm · UK vs US Difference: 2 sizes

What is 38 in UK size?

The short answer: EU 38 means UK 5 for women’s shoes and UK 4 for children’s shoes. For clothing, EU 38 is literally a size 38 in jackets and trousers. The catch is that these are three separate sizing systems that happen to share the number 38, which is where most confusion starts.

For shoes

EU 38 converts to UK 5 for women’s footwear according to the Saint G sizing guide. UK women’s sizes run two sizes smaller than US sizes, which means if you’re used to shopping in US sizes, you’ll need to subtract two full sizes to find your UK equivalent. This isn’t a rounding issue—it’s a structural difference between how the UK and US systems developed their numbering. The result is that a UK 5 is exactly equivalent to a US 7.5, as confirmed by Veronica Beard and Famous Footwear.

Men’s vs women’s

The EU sizing system doesn’t officially distinguish between men’s and women’s shoes—it’s just a numeric scale. However, UK and US systems do separate men’s and women’s sizing, which creates a translation gap. For men’s shoes, EU 38 is unusually small; most men’s ranges start at EU 39 or 40. If you’re seeing EU 38 recommended for men’s footwear, verify whether the retailer is using EU sizing for women’s shoes in their men’s department or simply rounding down from a smaller men’s range.

US equivalents

EU 38 corresponds to US women’s size 7.5 across the majority of retailers including Veronica Beard, Shoe-Inn, and Famous Footwear. ASOS lists US 7 as equivalent, which represents a minor rounding difference rather than a real discrepancy—US half sizes fill the gap between UK 5 and UK 5.5, so EU 38 can land on either side depending on how the retailer rounds.

Is a 38 a size 7 or 8?

This is where things get genuinely tricky. The answer depends on which sizing system you’re converting from and whether you’re talking about shoes or clothing. For shoes, EU 38 falls between US 7 and US 8—but closer to 7.5. For clothing, size 38 in the UK typically means a small or medium garment, which is unrelated to shoe sizing entirely.

Shoe size breakdowns

In the US women’s shoe system, EU 38 maps to 7.5, which is a half size. Since EU sizing typically doesn’t include half sizes (you go from 37 to 38 with no 37.5), the conversion requires rounding. Most retailers place EU 38 at US 7.5, though ASOS lists it as US 7. This discrepancy isn’t contradictory—it’s a rounding decision. When you buy EU 38, you may receive either a US 7 or US 7.5 depending on the brand’s internal conversion logic.

Common conversions

The practical range for EU 38 women’s shoes is US 7 to US 7.5 and UK 5 to UK 5.5. Laughing Hens lists UK 5.5 as an alternative conversion, which accounts for retailers who offer UK half sizes. The reason for the variation is that EU sizes are whole numbers while UK and US sizes can include halves. When EU 38 lands in a half-size gap in the UK/US systems, different retailers make different rounding calls.

The implication: don’t panic if a size chart shows UK 5.5 instead of 5—both are correct translations of EU 38, and the half-size difference is negligible in fit terms. What matters more is checking the actual foot length measurement, since Shoe City confirms EU 38 corresponds to 9.375 inches (about 238 mm), while ASOS lists 237 mm. That one-millimetre difference is where the rounding debate lives.

Which size is 38 in clothes?

Clothing size 38 is a completely separate system from shoe size 38. When a jacket or trouser is labeled 38, it refers to the chest or waist measurement in inches—typically 38 inches around the chest for a men’s jacket or 38 inches around the waist for trousers. EU 38 in clothing means UK 38, since the EU and UK clothing systems are effectively identical for this number range.

Women’s clothing

For women’s clothing, EU 38 typically corresponds to a UK size 10 or US size 8, though this varies significantly by retailer and garment type. The O’Neill women’s chart aligns EU and UK clothing sizing directly, confirming that EU 38 means the same as UK 38 for that brand. Always check the retailer’s specific size chart rather than relying on the generic conversion, since some brands vanity-size their clothing or use region-specific cuts.

Jackets and trousers

For tailored clothing like jackets and trousers, TK Maxx confirms that EU 38 aligns with suit and jacket sizes. The sizing notation “38 S/R/L” indicates a size 38 with fit variants: S for slim, R for regular, L for long. This is where clothing sizing diverges from shoe sizing—trousers and jackets use actual body measurements rather than a mapped numeric system, and the S/R/L designations add another layer of complexity on top.

UK charts

The UK clothing size chart for EU 38 shows this size as corresponding to a chest measurement of approximately 38–40 inches depending on the brand’s cut. Unlike shoe sizing, where conversions are relatively standardized across retailers, clothing size 38 can fit bodies with significantly different actual measurements. This is why checking specific retailer size charts is essential—buying “size 38” without verifying the actual garment measurements often results in poor fit.

What are the common mistakes when measuring feet?

Most sizing errors don’t come from confusing UK and EU systems—they come from improper foot measurement. The Saint G footwear guide identifies three measurement mistakes that systematically produce the wrong size.

Incorrect timing

Feet swell throughout the day, reaching their largest size in the evening. Measuring your feet in the morning when they’re at their smallest will consistently produce a shoe size that’s too small for afternoon wear. For the most accurate measurement, measure your feet late in the day rather than first thing in the morning.

Wrong tools

Using a ruler against a wall while standing on a hard floor can produce inaccurate results because you can’t see where your foot actually ends. A soft tape measure wrapped around the widest part of your foot while you’re standing on paper works better. Alternatively, trace your foot on paper and measure the tracing with a ruler—though this requires accounting for the pen’s thickness, which adds a small margin of error.

Measurement errors

One foot is typically larger than the other, sometimes by half a size or more. Saint G’s measurement guidance is explicit: always base your shoe size on the larger foot. Ignoring this and buying based on your smaller foot will result in a shoe that pinches the larger foot over time.

The pattern: even a small measurement error compounds when you apply it to a system where a single size covers a 9 mm range.

What is size 38 in Ireland?

Ireland uses UK sizing for most footwear and clothing, with EU sizes often listed as secondary references. The Irish retailers Guineys and TK Maxx confirm that EU 38 translates to UK 4 for children’s shoes and UK 5 for women’s shoes, which aligns exactly with UK sizing conventions.

Shoe equivalents

For Irish shoppers, EU 38 in footwear means UK size 4 (children’s) or UK size 5 (women’s), with the corresponding foot length being 22.7 cm for children’s size 4. The Guineys sizing data shows that children’s UK 4 corresponds to EU 38 and 22.7 cm, providing a direct reference point. Women’s EU 38 maps to UK 5 with the same conversion logic that applies in Great Britain.

UK alignment

Irish sizing is effectively identical to UK sizing since Ireland adopted the same sizing conventions prior to EU standardization. Whether you’re shopping in Dublin or Manchester, a size 38 garment or EU 38 shoe will fit the same body measurements. The only difference is that some Irish retailers display EU sizes prominently while others show UK sizes with EU as the secondary reference.

Regional retailers show consistent EU-to-UK conversions across sizing systems, with children’s sizes mapping directly to 22.7 cm foot length.

Five regions, one consistent foot length: every sizing system that maps to EU 38 converges on approximately 237–246 mm of actual foot length.

Retailer data shows strong agreement on EU 38 conversions despite different national systems.

Eight retailers, consistent result: six place EU 38 at UK 5 / US 7.5, while ASOS rounds to US 7 and Laughing Hens lists the UK 5.5 alternative. None of the variation is contradictory—it’s rounding within a half-size gap that EU whole-number sizing doesn’t resolve.

How to measure your feet for accurate EU 38 sizing

Confirmed facts vs what’s still unclear

Saint G footwear guide

UK women’s sizes are typically two sizes smaller than US sizes. For example, a US 8 equals a UK 6. Always measure both feet—one foot can be slightly bigger than the other. Base your size on the larger foot.

Veronica Beard size guide

Sneakers, boots, and heels fit differently. A US 7 sneaker may convert to an EU 38.5, but you might need EU 39 in heels for comfort. EU shoes may feel slightly larger since they do not have half sizes.

The variation between EU 38 appearing as UK 5 or UK 5.5 in different charts isn’t a contradiction—it’s an architectural gap in how sizing systems handle half sizes. EU sizing uses whole numbers while UK sizing includes halves, so any EU size necessarily falls between two UK sizes. The practical solution is to measure your foot in millimetres and match to the retailer chart rather than relying on a single conversion number.

For Irish and UK shoppers specifically, the sizing question resolves cleanly: EU 38 in footwear means UK 5 for women, UK 4 for children, and approximately 237 mm of foot length. For clothing, EU 38 means a chest or waist measurement of 38 inches, which is a separate system entirely. The buyers who run into problems are those who assume size 38 in shoes and size 38 in clothes are somehow related—they’re not, and treating them as equivalent will produce the wrong fit in both categories.