EU 42 to UK – Complete Size Conversion for Shoes and Clothing

Finding the right UK shoe or clothing size from an EU 42 tag is more nuanced than a simple one-to-one match. Depending on whether you are buying men’s footwear, women’s shoes, or apparel, the equivalent UK size shifts. This article breaks down the conversion using verified data, explains the differences between the two sizing systems, and provides a clear path to finding the best fit. For a deeper look at the full range of conversions, refer to the EU 42 to UK shoe size conversion guide.

What is EU 42 in UK Shoe Size?

For most adults, EU 42 converts to a UK men’s size 8. This is the most consistently reported figure across major retailers and conversion charts. The confirmation comes from a range of sources, including the ASOS Men’s Shoe Size Guide, which lists EU 42 as UK 8 with a foot length of 262 mm, and the Laughing Hens Conversion Chart, which also shows UK 8 for both men’s and women’s tables.

A small number of sources, particularly those using inch-based measurements, place EU 42 at UK 8.5. The Grivet Outdoors Shoe Size Chart, for example, maps EU 42 to UK 8.5 with a foot length of 10.25 inches (26 cm). This minor variation is normal and stems from differences in how brands measure the shoe last.

Key Insights on the Conversion

• EU 42 typically equals UK 8 for men’s shoes, but for women’s it can range from UK 7.5 to UK 8 depending on the brand.
• EU shoe sizes are based on the Paris point system (2/3 cm per size), while UK sizes are based on barleycorn (1/3 inch), leading to a non-linear conversion.
• Clothing size EU 42 roughly corresponds to UK 10 (women’s) or UK 36 (men’s suits), but this varies significantly by garment type.
• For the most accurate fit, measure foot length in cm and compare to brand-specific charts.
• EU 42 is a common size for women’s (larger) and men’s (medium) footwear; half sizes are rare in EU but available in UK.

Key Facts: EU 42 to UK Conversion

How Does EU 42 Convert for Women’s Shoes?

Women’s sizing introduces more variability than men’s. The Laughing Hens Conversion Chart assigns EU 42 to UK women’s size 8, while the Veronica Beard Women’s Guide lists EU 42 as US women’s 11, which implies a UK women’s range of roughly 8 to 9. This spread is not an error; it reflects real differences in shoe lasts across brands and styles.

Women’s UK sizing is typically 1 to 1.5 sizes smaller than men’s for the same foot length. Because EU sizing is unisex in its numbering, a woman wearing EU 42 will likely find that UK women’s 7.5 or 8 fits best, depending on the shoe’s cut and the brand’s specific last.

How Does EU 42 Convert for Men’s Shoes?

Men’s conversions are more stable. Multiple sources, including the Footlocker UK Size Guide, state that EU 42 equals UK men’s size 8, corresponding to a foot length of about 26.3 cm. The Grivet Outdoors Shoe Size Chart lists the same EU 42 as UK 8.5, using a foot length of 26 cm. This small difference is within acceptable tolerance for shoe sizing.

The mathematical formula from Wikipedia’s Shoe Size article confirms the standard: UK size = [(EU – 2) / 1.27] – 23. For EU 42, this yields approximately 8.03, which rounds to UK 8 on the adult men’s scale. Men’s UK 8 is widely accepted as the standard for EU 42.

What is Size 42 in UK Clothes?

Clothing conversions are less standardized than footwear. EU 42 in women’s clothing generally corresponds to a UK size 10, with a bust measurement around 86–90 cm, a waist of 68–72 cm, and hips of 94–98 cm. For men’s suits, EU 42 jacket size typically equates to a UK 36-inch chest, though this varies by brand and cut.

Dress shirts sized EU 42 often map to a UK collar of 16 to 16.5 inches. As with shoes, the lack of a universal standard means that the same EU 42 tag from different clothing brands can fit differently. Always consult the brand’s specific sizing table.

What Are the Common EU to UK Conversions for Other Sizes (41, 43, 44)?

Nearby EU sizes follow a predictable pattern based on the Paris point scale. EU 41 typically converts to UK men’s 7.5, EU 43 to UK 9, and EU 44 to UK 9.5 or 10, depending on the chart. These conversions are consistent across most major retailers, though the same slight variations for women’s and half sizes apply.

The semi-logarithmic nature of the two systems means that the difference per EU size is roughly 0.85 UK sizes. This ratio holds across the adult range, making it possible to estimate any conversion using the formula provided by Wikipedia.

How Does EU Shoe Sizing Compare to UK Sizing?

The two systems are built on different units. EU sizing uses the Paris point, where one size equals exactly 2/3 cm. UK sizing, by contrast, uses the barleycorn, where each full size adds 1/3 inch or about 0.85 cm. Size 0 in the UK system starts at 4 inches (10.16 cm), while EU size 1 starts near zero and scales linearly.

This difference in starting point and increment means the conversion is not a simple addition or subtraction. As the Begg Shoes Blog notes, EU sizes jump around 5/6 of a UK size for every step on the scale. This non-linear relationship is why EU 42 maps cleanly to UK 8 for men but can vary for women, whose sizing follows a different reference baseline.

How Have Shoe Sizing Systems Evolved Over Time?

The shoe sizing standards we use today developed over centuries. The UK barleycorn system emerged in the 1300s, starting at size 0 with a length of 4 inches, each step adding 1/3 inch. The European Paris point system was formalized in the 1800s, with each increment representing 2/3 cm. In the mid-20th century, the Mondopoint system was introduced, measuring foot length in millimeters, but it never gained widespread commercial adoption outside of specialized contexts. By 2025, online conversion tools are common, yet brand-specific size charts remain the most reliable resource due to the inherent variability in shoe lasts.

1. 1300s – The barleycorn system (UK) is introduced. Size 0 equals 4 inches, and each full size adds 1/3 inch.
2. 1800s – The Paris point system (EU) is developed. Each size corresponds to 2/3 cm of foot length.
3. 1960s–1970s – The Mondopoint system (foot length in mm) is introduced but is not widely adopted by consumer footwear brands.
4. 2025 – Online converters are common, but brand-specific charts are recommended due to continued variability in lasts and manufacturing tolerances.

What Do We Know for Certain About EU 42 to UK Conversions?

Recommendation: Always verify with the brand’s own size chart or try shoes on when possible.

How Do EU and UK Sizing Systems Actually Work?

EU shoe sizes measure the shoe last length in Paris points, where one size equals 2/3 cm. A size 42 corresponds to a last length of roughly 28 cm, but because the system includes a standard allowance for toe room (typically 1.5 to 2 cm beyond the foot length), the intended foot length for EU 42 is about 26.7 cm. This offset is consistent across the adult EU scale.

UK sizes start at a base of 4 inches for size 0 and add 1/3 inch per size. A UK size 8 therefore represents a last length of approximately 10.67 inches, or about 27.1 cm. After subtracting the same toe allowance, the foot length for UK 8 lands near 26.2 cm, which aligns closely with the foot length intended for EU 42. This close match explains why EU 42 and UK 8 are considered equivalent for most men’s footwear.

Clothing sizing follows different logic. EU clothing numbers are based on body measurements in centimeters. A women’s EU 42 dress is built for a bust of 86–90 cm, which most UK brands label as a size 10. Men’s jackets sized EU 42 correspond to a UK 36-inch chest. These conversions are less rigid because garment cuts and intended fits vary more than shoe lasts.

What Do Authoritative Sources Say About EU 42 to UK?

“Contrary to common understanding, EU sizes do not translate directly to UK sizes. Typically they jump around 5/6 of a UK size for every EU size on the scale.”

— Begg Shoes Blog (Dec 2025)

“A men’s EU shoe size of 42 is equivalent to a UK size 8. It’s a US men’s size 8.5 and is intended for a foot length of about 26.3 cm (10.4 inches).”

— Footlocker UK Size Guide

These two statements sum up the consensus: EU 42 equals UK 8 for men, but the conversion is not a simple linear mapping across the entire size scale. Each source confirms the core conversion while acknowledging that brand-specific variations exist.

What Is the Bottom Line for EU 42 to UK?

For men’s shoes, EU 42 confidently equals UK 8. For women’s shoes, the range is UK 7.5 to 8, with brand variance playing a significant role. Clothing conversions place EU 42 at roughly UK 10 for women and UK 36 for men’s jackets, though garment type and cut can shift this. The most reliable method is to measure foot length in centimeters and compare it against the brand’s own size chart. For a deeper look at the full range of conversions, refer to the EU 42 to UK shoe size conversion guide.

Frequently Asked Questions