Quick Answer: Measure both feet while standing and use the longer measurement. Enter the length in centimeters or inches, then select U.S. men's/unisex or women's sizing. This calculator uses New Balance's published size charts to estimate U.S., U.K. and EU sizes, including half sizes. The two U.S. sizing systems are not interchangeable. Shoes and feet vary, so the result is a starting point, not a guarantee. If you fall between chart entries, the tool selects the next listed size. Check your shoe brand's chart and width options before ordering. Use the shoe size calculator ↓
Adult Shoe Size Calculator
Enter the length of your longer foot, choose centimeters or inches and select the U.S. sizing system. The calculator will show your estimated U.S., U.K. and EU sizes.
The result is an estimate based on one brand's chart. Verify the exact shoe model and width before ordering.
Last Updated on October 22, 2026
Why Finding the Right Shoe Size Matters
Wearing the correct shoe size is essential for comfort, support, and foot health. Shoes that are too small can cause pain, blisters, and long-term foot issues, while oversized shoes may lead to instability and discomfort. To avoid these problems, it’s important to measure your feet properly and refer to a reliable size chart before buying shoes.
How to Measure Your Feet at Home
To get an accurate shoe size, follow these simple steps:
- Gather Your Supplies – You’ll need a blank sheet of paper, a pen or pencil, a ruler, and a flat, hard surface.
- Position Your Foot – Stand straight with your heel against a wall and your weight evenly distributed.
- Trace Your Foot – Place the paper under your foot and carefully trace around it with a pen, keeping the pen upright.
- Measure Your Foot Length – Use a ruler to measure from the heel to the longest toe in both centimeters (cm) and inches (in).
- Measure Both Feet – Since one foot is often slightly larger than the other, measure both and use the larger measurement.
- Use the Shoe Size Chart Below – Compare your foot length to the size chart to find the best fit.
- Shoe Size Calculator – If you know your foot length in inches or centimeters, use our online adult shoe size calculator. Jump to calculator
See also: Kids Shoe Size Calculator
Adult Shoe Size Charts for Men and Women
Men's / Unisex Shoe Size Chart
| Foot length (cm) | U.S. men's | U.K. | EU |
|---|---|---|---|
| 20.5 | 2.5 | 2 | 34 |
| 21 | 3 | 2.5 | 35 |
| 21.5 | 3.5 | 3 | 35.5 |
| 22 | 4 | 3.5 | 36 |
| 22.5 | 4.5 | 4 | 37 |
| 23 | 5 | 4.5 | 37.5 |
| 23.5 | 5.5 | 5 | 38 |
| 24 | 6 | 5.5 | 38.5 |
| 24.5 | 6.5 | 6 | 39.5 |
| 25 | 7 | 6.5 | 40 |
| 25.5 | 7.5 | 7 | 40.5 |
| 26 | 8 | 7.5 | 41.5 |
| 26.5 | 8.5 | 8 | 42 |
| 27 | 9 | 8.5 | 42.5 |
| 27.5 | 9.5 | 9 | 43 |
| 28 | 10 | 9.5 | 44 |
| 28.5 | 10.5 | 10 | 44.5 |
| 29 | 11 | 10.5 | 45 |
| 29.5 | 11.5 | 11 | 45.5 |
| 30 | 12 | 11.5 | 46.5 |
| 30.5 | 12.5 | 12 | 47 |
| 31 | 13 | 12.5 | 47.5 |
| 31.5 | 13.5 | 13 | 48.5 |
| 32 | 14 | 13.5 | 49 |
| 33 | 15 | 14.5 | 50 |
| 34 | 16 | 15.5 | 51 |
| 35 | 17 | 16.5 | 52 |
| 36 | 18 | 17.5 | 53 |
| 37 | 19 | 18.5 | 54 |
| 38 | 20 | 19.5 | 55 |
Women's Shoe Size Chart
| Foot length (cm) | U.S. women's | U.K. | EU |
|---|---|---|---|
| 20 | 3 | 1 | 33 |
| 20.5 | 3.5 | 1.5 | 33.5 |
| 21 | 4 | 2 | 34 |
| 21.5 | 4.5 | 2.5 | 34.5 |
| 22 | 5 | 3 | 35 |
| 22.5 | 5.5 | 3.5 | 36 |
| 23 | 6 | 4 | 36.5 |
| 23.5 | 6.5 | 4.5 | 37 |
| 24 | 7 | 5 | 37.5 |
| 24.5 | 7.5 | 5.5 | 38 |
| 25 | 8 | 6 | 39 |
| 25.5 | 8.5 | 6.5 | 40 |
| 26 | 9 | 7 | 40.5 |
| 26.5 | 9.5 | 7.5 | 41 |
| 27 | 10 | 8 | 41.5 |
| 27.5 | 10.5 | 8.5 | 42.5 |
| 28 | 11 | 9 | 43 |
| 28.5 | 11.5 | 9.5 | 43.5 |
| 29 | 12 | 10 | 44 |
| 29.5 | 12.5 | 10.5 | 45 |
| 30 | 13 | 11 | 45.5 |
| 30.5 | 13.5 | 11.5 | 46 |
| 31 | 14 | 12 | 46.5 |
| 32 | 15 | 13 | 48 |
Source: New Balance official size guide. Shoe sizes and width recommendations can vary by brand and model.
Tips for Finding the Perfect Fit
- Measure in the Evening – Feet tend to swell slightly throughout the day, so measure later for the most accurate fit.
- Leave Some Room – There should be about a thumb’s width (½ inch or 1.2 cm) of space between your longest toe and the front of the shoe.
- Consider Socks – If you usually wear socks with your shoes, measure with them on for an accurate fit.
- Check Shoe Width – If you have wider feet, consider wide-fit shoe options.
- Walk in the Shoes – Ensure the shoes feel comfortable, with no pinching or slipping when you walk.
When to Replace Your Shoes
Your shoes don’t last forever! Here are some signs it’s time for a new pair:
- The soles are worn out and provide less grip.
- The shoes feel loose or stretched out.
- You experience foot pain or discomfort after wearing them.
- The insoles are flattened, losing their cushioning.
Use this calculator as a starting estimate and check the shoe maker's size chart, fit and width before buying.
See also: Kids Shoe Size Calculator & more shoe calculators
