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Shoe Size Conversion Chart

A US men’s 9 is a UK 8.5, EU 42, fitting a 26.0 cm foot. A 26.0 cm foot takes a men’s US 9 or a women’s US 10.5, and a women’s US 8 is a men’s US 6.5. Look up any size below, find your size from a foot measurement, or convert between men’s and women’s — then print the full chart.

422

Shoe size lookup

Pick men’s or women’s and a US size to see the full row: UK, EU, and foot length in cm.

Men’s and women’s US sizes use different scales — the same number means a different foot length.

Your US size in half-size steps. Men’s runs 6 to 16; women’s runs 4 to 12.

Result—Enter values above

Enter values to see the result.

423

Find your size from foot length

Measure your foot in centimeters (evening, standing, heel to longest toe) and get the nearest men’s and women’s US sizes — rounded up so the insole clears your foot.

Heel to longest toe in centimeters, measured standing in the evening. Must be between 20.8 and 31.8 cm.

Result—Enter values above

Enter values to see the result.

424

Men’s to women’s converter

Convert between the two US scales using the industry’s 1.5-size rule, checked against the chart for an exact match wherever the tables agree.

Which US scale your size is in. The converter gives you the other scale.

Your size on that scale, in half-size steps.

Result—Enter values above

Enter values to see the result.

The 60-second rule

Shoe size = foot length + wiggle room, translated through one of four scales. US, UK, and EU numbers are just different labels for the same foot length in centimeters. A 26.0 cm foot is a US men’s 9, a UK 8.5, and an EU 42. The lookup above reads any row of the chart; the finder rounds your measurement up to the next charted size; the converter jumps between the men’s and women’s US scales.

The worked examples, line by line

Lookup: US men’s 9 → the chart row reads UK 8.5, EU 42, 26.0 cm. Same row as a US women’s 10.5 — because the women’s 10 is 25.9 cm (a hair short) and 10.5 is 26.2 cm (the next available), the industry’s 1.5-size shorthand lands on 10.5.

Foot-length finder: a 26.0 cm foot rounds up to men’s US 9 (26.0 cm row exactly) and women’s US 10.5 (26.2 cm is the first row at or above 26.0). Rounding up is deliberate — toes need clearance, and half a size of extra room beats blisters.

Men’s–women’s converter: women’s US 8 (24.1 cm) matches the men’s chart row at 24.1 cm exactly: men’s US 6.5 — an exact chart match, no rule needed. Where the tables don’t share a row, the converter falls back to the ±1.5 rule (men’s 9 + 1.5 = women’s 10.5).

The printable reference tables

Both charts in full, men’s and women’s, US to UK, EU, and foot length. Use your browser’s print function for a hard copy — the tables are print-styled.

Men’s

USUKEUFoot (cm)
65.53923.5
6.563924.1
76.54024.4
7.5740-4124.8
87.54125.4
8.5841-4225.7
98.54226.0
9.5942-4326.7
109.54327.0
10.51043-4427.3
1110.54427.9
11.51144-4528.3
1211.54528.6
1312.54629.4
1413.54730.2
1514.54831.0
1615.54931.8

Women’s

USUKEUFoot (cm)
423520.8
4.52.53521.3
5335-3621.6
5.53.53622.2
6436-3722.5
6.54.53723.0
7537-3823.5
7.55.53823.8
8638-3924.1
8.56.53924.6
9739-4025.1
9.57.54025.4
10840-4125.9
10.58.54126.2
11941-4226.7
11.59.54227.1
121042-4327.6

Output · formula · meaning

OutputFormulaWhat it means
Chart rowdirect table lookup by US size and genderUS men’s 9 → UK 8.5, EU 42, 26.0 cm — every scale’s label for the same foot.
Size from foot lengthfirst charted row with cm ≥ your measurement (rounds up)26.0 cm → men’s 9 / women’s 10.5 — rounded up so the insole clears your foot.
Men’s–women’s conversionexact cm-row match, else the ±1.5-size ruleWomen’s 8 → men’s 6.5 (exact 24.1 cm match); men’s 9 → women’s 10.5 (1.5 rule).

Who uses this

  • The cross-border shopper: a US men’s 9 ordering from a UK site — converts to UK 8.5 instead of guessing and paying return shipping.
  • The gift buyer: knows her sister is a women’s 8 but the listing is EU — reads EU 38-39 off the chart and orders once.
  • The thrift-store hunter: finds a pair marked EU 42 — checks that it means US men’s 9 / 26.0 cm before trying them on.
  • The in-between-sizes runner: measures 26.0 cm at night, takes the women’s 10.5 instead of squeezing into the 10, and skips the blisters.

Accuracy & limitations

These are consensus conversions assembled from multiple published size charts — but sizes vary by brand, sometimes by a full half size. Athletic brands tend to run small, dress brands true, and European brands use the EU number as the master. Measure in the evening: feet swell up to half a size during the day, so a morning measurement undersizes you. The ±1.5 rule (women’s = men’s + 1.5) is the industry shorthand where the charts disagree — close, but the exact row match is truer. Width (narrow/regular/wide) is not covered here; two feet the same length can need different widths. When between sizes, go up.

Cite this calculatorBright Side Kit. “Shoe Size Conversion Chart.” brightoolbox.com, 2026.Bright Side Kit. "Shoe Size Conversion Chart." https://brightoolbox.com/shoe-size-chart/ Accessed October 23, 2026.
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Frequently asked questions

Why is a US men’s 9 a women’s 10.5?

Because both fit the same 26.0 cm foot. On the women’s chart, the 10 is 25.9 cm (a hair short) and the 10.5 is 26.2 cm (the next available) — and the industry’s ±1.5-size rule (men’s 9 + 1.5 = women’s 10.5) lands on the same answer.

Is a UK 8.5 the same as a US 9?

In men’s sizes, yes — UK = US − 0.5 is the convention (US men’s 9 = UK 8.5). In women’s sizes the gap is bigger: US women’s 9 = UK 7. The two US scales are different systems wearing the same number.

How do I measure my foot for shoe size?

Stand on a sheet of paper in the evening, trace around your foot, and measure heel to longest toe in centimeters. Use the longer foot. Type that number into the finder above — it rounds up to the next charted size.

Do shoe sizes really vary by brand?

Yes — up to half a size between brands on the same nominal size. Athletic shoes often run small, EU brands run truest to the EU number. That is why the centimeter column is the honest one: trust the cm, not the label.

What’s the difference between EU 42 and 42.5?

About 3–4 mm of insole length — the EU scale steps every two-thirds of a centimeter. Some charts collapse half-steps into ranges (like 42-43); this chart shows those ranges where the consensus does.

Should I size up if I’m between sizes?

Yes. A shoe that is half a size too big laces down fine; a shoe half a size too small punishes every step. The foot-length finder on this page already rounds up for exactly this reason.

Are kids’ sizes on a different scale?

Yes — kids’ US sizes are a separate scale (and they overlap adult numbers confusingly). This chart covers adult men’s and women’s only; a kids’ chart is on the roadmap.