Sandal Size Conversion Chart: US to UK and EU

Updated: February 2026

Sandals present unique sizing challenges because of their open design, adjustable straps, and minimalist structure. This comprehensive guide provides accurate conversion charts for US, UK, and EU sandal sizes, along with brand-specific recommendations for Birkenstock, Teva, and fashion sandals to help you achieve the perfect fit.

Why Sandal Sizing Requires Special Attention

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Unlike closed-toe shoes, sandals expose most of your foot, making proper sizing more noticeable and fit more critical for comfort and appearance. Straps should secure your foot without cutting into skin, your heel should sit within the footbed boundaries, and your toes shouldn't extend beyond the sole's edge. International sizing adds complexity, but understanding conversions and brand-specific characteristics ensures success.

Men's Sandal Size Conversion Chart

US 7 = UK 6 = EU 40
US 8 = UK 7 = EU 41
US 9 = UK 8 = EU 42-43
US 10 = UK 9 = EU 43-44
US 11 = UK 10 = EU 44-45
US 12 = UK 11 = EU 45-46
US 13 = UK 12 = EU 47-48

Women's Sandal Size Conversion Chart

US 5 = UK 3 = EU 35-36
US 6 = UK 4 = EU 36-37
US 7 = UK 5 = EU 37-38
US 8 = UK 6 = EU 38-39
US 9 = UK 7 = EU 39-40
US 10 = UK 8 = EU 40-41
US 11 = UK 9 = EU 41-42

Birkenstock Size Conversion and Fit Guide

Birkenstock uses EU sizing exclusively and offers two width options: Regular (Normal) and Narrow (Schmal). The Regular width fits most people, roughly equivalent to US medium and wide widths. The Narrow width corresponds to US narrow and some medium widths.

Birkenstock sizing by US shoe size:

Women's US 5-5.5 = Birkenstock EU 36
Women's US 6-6.5 = Birkenstock EU 37
Women's US 7-7.5 = Birkenstock EU 38
Women's US 8-8.5 = Birkenstock EU 39
Women's US 9-9.5 = Birkenstock EU 40
Men's US 7-7.5 = Birkenstock EU 40
Men's US 8-8.5 = Birkenstock EU 41
Men's US 9-9.5 = Birkenstock EU 42
Men's US 10-10.5 = Birkenstock EU 43
Men's US 11-11.5 = Birkenstock EU 44
Men's US 12-12.5 = Birkenstock EU 45

Birkenstock fit guidelines: Your foot should sit completely within the footbed with approximately 5mm (about 1/4 inch) of space around all edges. When standing, you should see the footbed edges beyond your foot. The arch support should align with your natural arch, and straps should be snug but not tight. Birkenstocks require a break-in period of 7-14 days as the cork molds to your unique foot shape.

Teva and Sport Sandal Sizing

Teva sandals typically run true to US size but tend to be generous in length and width. Many people with narrow to medium feet size down by half a size for a more secure fit, especially in water-sport models where a snug fit prevents the sandal from floating away.

Teva conversion considerations:

Sport sandals with adjustable straps offer more size flexibility
The Hurricane and Terra models run slightly large
Closed-toe sport sandals like the Omnium fit more like athletic shoes and follow standard conversions
Neoprene-lined models may feel tighter initially but stretch slightly with wear

Fashion Sandal Sizing Considerations

Slide sandals: These should fit snugly as they have no back strap to secure your foot. Your foot should sit comfortably within the sandal's width without hanging over edges. European fashion slides often run narrow—those with wider feet may need to size up.

Strappy sandals and heeled sandals: Follow standard dress shoe conversions, but remember that Italian and Spanish brands typically run narrow and small. Many women report sizing up a full EU size from standard conversions when buying from luxury European brands like Aquazzura or Gianvito Rossi.

Gladiator sandals: The abundance of straps provides adjustment flexibility, but the sole length must still be appropriate. Measure your foot and compare to the sandal's insole length when provided by the manufacturer.

Width Considerations for Sandals

Sandal width is critical because your foot is fully visible. If your foot extends significantly beyond the footbed on either side, the sandal is too narrow regardless of length fit. Conversely, if there's more than 1/4 inch of sandal visible on both sides of your foot, the sandal may be too wide and could cause instability.

Brand width characteristics: Birkenstock Regular is generous (wide by most standards), Clarks sandals run wide-friendly, Naot (Israeli brand) offers accommodating width, while most Italian brands run narrow. Reef and other surf-inspired brands typically offer medium to wide proportions suitable for casual wear.

Measuring Your Foot for Sandals

Stand on paper and trace your foot, then measure both length (heel to longest toe) and width (at the widest part of your foot, typically at the ball). Compare these measurements to the sandal's footbed dimensions if available. Many European brands now provide footbed length and width measurements in centimeters, which is more accurate than size conversions alone.

Adjustable vs. Non-Adjustable Sandals

Adjustable strap sandals (Teva, Chaco, Birkenstock with buckles): These offer more size flexibility. If you're between sizes, you can often make either size work by adjusting the straps. Choose the smaller size if you have narrow feet and the larger size if you have wider feet.

Non-adjustable sandals (slides, flip-flops, molded footbed): These require more precise sizing as there's no adjustment capability. When in doubt, size up for non-adjustable styles, as sandals that are slightly large are more comfortable than sandals that are too small.

Material Considerations and Stretch

Leather sandals may feel snug initially but will stretch and mold to your feet over several wears. Synthetic materials generally don't stretch significantly. Cork and EVA footbeds (like Birkenstock) mold to your unique foot shape over time, creating a custom fit after the break-in period.

International Shopping Tips for Sandals

When ordering sandals from UK or EU retailers, look for customer reviews that mention sizing accuracy. Many international retailers now include photos of the product on actual feet, which helps visualize fit. Check the return policy carefully—some international retailers charge return shipping fees that can significantly increase the cost if sizing is incorrect.

By using these detailed conversion charts and understanding brand-specific and style-specific sandal characteristics, you can confidently order sandals from international retailers and enjoy comfortable, properly fitting footwear for warm weather and casual occasions.

Expert Summary: Sandal Size Conversion Chart: US to UK and EU is a topic where small details matter. The practical tips in this guide will help you navigate it with confidence.

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