I help readers keep their feet comfortable and functional every day, and one of the simplest ways to spare yourself pain, blisters, and wasted money is to make sure your shoes actually fit. I’ve measured hundreds of feet—my own included—and learned that a few careful steps at home will get you a reliable measurement for length, width, and volume so you can pick shoes that feel good from the first wear. Below I share practical, research-backed methods I use and recommend, plus answers to the common questions I hear from people trying to buy shoes online.
Why measuring your feet matters
Most of us rely on the same shoe size we’ve been wearing for years, but feet change with age, weight, activity, and pregnancy. Shoes from different brands also fit differently because lasts (the moulds shoemakers use) vary. A measured approach prevents common problems: toes jammed against the toe box, heel slippage, pinching across the forefoot, and poor support that can lead to issues like plantar fasciitis or bunion irritation.
What you'll need
Step-by-step: measuring length and width
This method gives you the most consistent home result. I recommend measuring both feet because they often differ; fit to the larger foot.
Measuring foot volume (why it matters and a simple test)
Foot volume influences how shoes feel around the instep and across the midfoot. Two people with the same length and width can feel very different if one has a high-volume foot. While there are lab tools for precise volume measurement, you can do a quick at-home check:
Using your measurements: converting to shoe sizes
Different countries use different sizing systems and brands interpret sizes uniquely. The most reliable step is to consult the brand’s own size chart using your foot length in centimetres. If a brand provides a last width or fit notes (narrow/regular/wide), match that to your width measurement.
| Foot length (cm) | Typical UK size (women) | Typical EU size |
|---|---|---|
| 22.5 cm | 3.5–4 | 36 |
| 23.5 cm | 5–5.5 | 37–38 |
| 24.5 cm | 6–6.5 | 39 |
| 25.5 cm | 7–7.5 | 40–41 |
Note: This table is a quick reference. Always use the brand-specific chart and consider width/volume notes.
Practical tips for different types of shoes
Different shoe types require slightly different fit priorities:
Common questions I hear
Q: Should I size up for comfort?
A: Sometimes. If a brand runs narrow or you have wider feet, sizing up can help, but avoid shoes that feel loose in the heel—this will cause rubbing. If you size up, use an insole to take up extra length for a secure fit.
Q: How often should I measure my feet?
A: Once a year is a good habit, or whenever you notice discomfort, a change in weight, or during/after pregnancy. Children’s feet should be measured more frequently—every 2–3 months if they’re growing fast.
Q: Can I rely on my old shoe size listed on shopping sites?
A: Use it as a starting point, but always check the product’s size chart and read fit reviews. When in doubt, contact customer service with your foot measurements—they can often recommend the best size based on that brand’s last.
Brands and tools I find helpful
I often recommend trying shoes from brands that provide detailed fit notes and multiple width options—New Balance, Brooks, and Mephisto are good examples for varied widths. For orthotics-friendly options, look at brands with removable footbeds like Birkenstock or Vionic.
If you’re buying frequently online, consider small invest in a Brannock Device or a digital foot scanner—some speciality stores and podiatrists offer scanning that gives length, width, and volume. It’s a useful reference if you plan to buy multiple pairs from different brands.
Fit checks when your shoes arrive
Measuring at home isn’t complicated, and a few minutes of care will save you time, money, and discomfort. Keep a record of your foot measurements and note which brands and models fit you well—that personalised data is the best guide for future purchases, especially online. If you want, I can provide a printable measurement sheet or a quick checklist you can use before ordering shoes—just say the word and I’ll put one together for Onepairoffeet Co readers.
