You may have noticed fractional shoe sizes on some models, such as 38 2/3 or 37 1/3, but what do they actually mean?
Not everyone’s feet fit perfectly into whole sizes like 37 or 38, so fractional sizes help provide a more precise fit.
The 1/3 and 2/3 fractions indicate incremental adjustments in shoe length, typically measured in millimeters or centimeters.
For example:
- Size 40 shoe length → 25 cm
- Size 40 2/3 shoe length → 25.5 cm
- Size 41 1/3 shoe length → 26 cm
It may seem confusing, but it’s actually quite simple!
Understanding Fractional Shoe Sizes
📌 0/3 or 3/3 sizes indicate a whole number size (e.g., 37, 38, 39), so these fractions are typically not written.
📌 1/3 sizes are slightly larger than the previous whole size:
- 36 1/3 → Between 36 and 37
- 37 1/3 → Between 37 and 38
- 38 1/3 → Between 38 and 39
- 39 1/3 → Between 39 and 40
- 40 1/3 → Between 40 and 41
📌 2/3 sizes are slightly smaller than the next whole size:
- 36 2/3 → Between 36 and 37, but larger than 36 1/3
- 37 2/3 → Between 37.5 and 38
- 38 2/3 → Between 38.5 and 39
- 39 2/3 → Between 39.5 and 40
- 40 2/3 → Between 40.5 and 41
📌 Examples:
- 43 1/3 → Equivalent to 43.5 in standard sizing.
- 36 1/3 and 36 2/3 → Intermediate sizes between 36 and 37, divided into thirds.
- 37 2/3 → Between 37.5 and 38.
🔹 Important Correction: The 1/3 and 2/3 system does not divide whole sizes into exact mathematical thirds (i.e., 37 1/3 is not exactly 37.33). Instead, it follows a standardized measurement system used by major brands.
Choosing the Right Size Based on Foot Length
Measuring heel-to-toe length is the best way to find your correct shoe size. Below is a general guide based on foot measurements:
| Heel-to-Toe Length (cm) | Recommended Shoe Size |
|---|---|
| 8.7 cm | Size 36 |
| 8.9 cm | Size 36 2/3 (36.5 equivalent) |
| 9.1 cm | Size 37 |
| 9.3 cm | Size 37 2/3 (37.5 equivalent) |
| 9.5 cm | Size 38 |
| 9.7 cm | Size 38 2/3 (38.5 equivalent) |
| 9.9 cm | Size 39 |
| 10.1 cm | Size 39 2/3 (39.5 equivalent) |
| 10.2 cm | Size 42 |
| 10.4 cm | Size 42 2/3 (between 42.5 and 43) |
🔹 Correction: Different brands may have slightly different length measurements for the same size. For example, Nike’s size 42 may be 27 cm, while Adidas’ size 42 is 26.5 cm. Always check the brand’s official size chart!
Why Are Fractional Shoe Sizes Useful?
If your foot doesn’t fit perfectly into a whole size, fractional sizes offer a more precise fit, reducing discomfort and improving overall comfort.
This is especially crucial for sports shoes, running shoes, and hiking shoes, where the correct size directly affects performance. Wearing the wrong size can cause pain, blisters, and walking difficulties.
That’s why understanding fractional sizes when buying shoes is essential for both comfort and foot health! 👟
Final Thoughts
I hope this guide has answered all your questions about fractional shoe sizes! What’s your shoe size? Have you tried fractional sizing before? Share your thoughts in the comments! 😊
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