Size Guide
Every Tidelune style is labelled with its US, UK and EU size, exactly as you see it on the product page. Use the chart below to find yours in the system you know best — and measure your foot for the most accurate fit.
How to measure your foot
- Stand on a sheet of paper with your heel against a wall, wearing the socks you plan to wear.
- Mark the tip of your longest toe and measure from the wall to the mark.
- Measure both feet and use the longer one. Measuring in the evening gives the most realistic result.
- Find the size whose foot length is equal to or just above your measurement.
Women's shoe size chart
All sizes shown are the ones available across our collection — not every style comes in every size, so check the size selector on each product.
| EU | US | UK | BR | Foot length | Foot length |
|---|---|---|---|---|---|
| 35 | 6 | 4 | 33 | 21.8 cm | 8.58" |
| 36 | 6.5 | 4.5 | 34 | 22.5 cm | 8.86" |
| 37 | 7.5 | 5.5 | 35 | 23.2 cm | 9.13" |
| 38 | 8 | 6 | 36 | 23.8 cm | 9.37" |
| 39 | 8.5 | 6.5 | 37 | 24.5 cm | 9.65" |
| 40 | 9 | 7 | 38 | 25.2 cm | 9.92" |
| 41 | 9.5 | 7.5 | 39 | 25.8 cm | 10.16" |
| 42 | 10.5 | 8.5 | 40 | 26.5 cm | 10.43" |
| 43 | 11 | 9 | 41 | 27.2 cm | 10.71" |
| 44 | 11.5 | 9.5 | 42 | 27.8 cm | 10.94" |
| 45 | 12 | 10 | 43 | 28.5 cm | 11.22" |
| 46 | 13 | 11 | 44 | 29.2 cm | 11.50" |
| 47 | 13.5 | 11.5 | 45 | 29.8 cm | 11.73" |
| 48 | 14.5 | 12.5 | 46 | 30.5 cm | 12.01" |
| 49 | 15 | 13 | 47 | 31.2 cm | 12.28" |
| 50 | 15.5 | 13.5 | 48 | 31.8 cm | 12.52" |
Between sizes, wide feet or thick socks? Choose the next size up.
Asia (JP / CN / KR): sizes there are based on foot length — use the centimetre column (e.g. JP 24.5 ≈ 24.5 cm).
Foot lengths are approximate and can vary by a few millimetres between styles. If you're unsure, email us your foot length and the style you like and we'll recommend a size.
Width & fit
- Wide-toe and barefoot styles (look for "Wide-Toe" or "Wide-Fit" in the name) have extra room at the front and suit wider feet and bunions.
- Slippers are worn without shoes over them, so a snug fit is usually most comfortable — if in doubt between two sizes, check the foot-length column.
- Boots: if you plan to wear thick winter socks, measure your foot with them on, or choose the next size up.
Insole sizes
Our cushioned insoles come in letter sizes. Each one covers the shoe sizes below.
| Insole | Fits shoe sizes |
|---|---|
| XS | EU 35–37 · US 6–7.5 · UK 4–5.5 |
| S | EU 38–39 · US 8–8.5 · UK 6–6.5 |
| M | EU 40–43 · US 9–11 · UK 7–9 |
| L | EU 44–46 · US 11.5–13 · UK 9.5–11 |
| XL | EU 47–49 · US 13.5–15 · UK 11.5–13 |
Still not the right fit?
No problem — see our return policy or contact us and we'll help.