Buying sneakers online can be tricky. Sizes aren’t always consistent across brands, and a bad fit can ruin both comfort and style. Use this guide to make sure your next pair fits perfectly the first time.
1. Measure Your Feet the Right Way
- Stand on a piece of paper with socks on.
- Trace your foot outline.
- Measure the length from heel to longest toe and the width at the widest point.
- Do this for both feet and go with the larger measurement.
Tip: Measure at the end of the day when your feet are slightly swollen for the most accurate fit.
2. Know That Brands Fit Differently
- Nike runs narrow, often half a size small.
- Adidas is usually true to size.
- New Balance and Asics have wider fits.
- Jordan retros can run snug, especially in smaller sizes.
Always check the brand’s official size chart before buying.
3. Understand US, UK, and EU Conversions
Sizing labels vary. For example:
- Men’s US 9 = UK 8 = EU 42.5
- Women’s US 8 = UK 6 = EU 39
If you shop globally, double-check conversions to avoid mistakes.
4. Pay Attention to Materials
- Leather molds to your foot and may loosen over time.
- Mesh and knit uppers stretch, so you can often go true to size.
- Suede holds shape longer and feels tighter at first.
5. Read Reviews and Fit Notes
Sneaker communities often share how a shoe runs. Look for keywords like “TTS” (true to size), “narrow,” or “go half size up.”
6. Don’t Forget Socks and Insoles
- Thicker socks need a little more room.
- Performance insoles can change fit.
- If you swap insoles, size up half for comfort.
Final Word
Getting sneaker sizing right online takes a little homework, but it saves you money and frustration. Measure your feet, study size charts, and use community feedback. With the right approach, you’ll land the perfect fit every time.

