How to Find Your Shoe Size at Home (No Store Needed)

You want to order shoes online and the product page wants a number you don't have. Every "how to measure your foot size" article repeats the same trace-on-paper trick, then stops - a single length number and a generic size chart, with nothing about width, nothing about how that number actually maps across US, UK, and EU sizing, and nothing about what to do once you're comparing the same sneaker across five different stores that each round slightly differently. None of them mention that sitting down while you trace, or doing it on carpet, quietly shrinks your outline enough to land you a half size too small.

This guide covers the measuring method that actually works at home, a complete US-UK-EU-CM conversion chart with width categories, the specific mistakes that throw off most DIY foot measurements, and — once you have a number you trust — how to save and compare shoes from multiple stores and preview them on your own feet with AI try-on before you buy, using a cross-store wishlist like Spree.

Why Guessing Your Shoe Size Goes Wrong

There is no single "shoe size" the way there's a single foot length. The number on a shoe's label depends on the brand, the region's sizing scale, and sometimes the specific shoe's last - the mold the shoe was built around. A measurement taken sitting down, on a soft surface, or without checking width can be off by a full size before you even open a conversion chart. That's exactly why the same "size 9" sneaker fits perfectly at one brand and pinches at another, and why so many online shoe orders come back for an exchange.

The Trace-and-Measure Method: How to Measure at Home

You'll need a sheet of paper, tape, a pen, and a ruler that shows centimeters. The whole thing takes about ten minutes for both feet.

Shoe Size Conversion Chart: US, UK, EU, CM, and Width

The US and UK use different numeric scales for men's and women's shoes, while the EU scale is based on the Paris point system. Match your measured foot length in centimeters to the closest row below, then check the width note against your measured width.

For width, a measurement roughly 38–41% of your foot length is a medium (B/D) width, below that range reads as narrow, and above it reads as wide (E/EE and up) — but as with the clothing size conversion chart, treat this as a reliable starting point rather than a guarantee, since individual brands round and shape their lasts differently.

What to Do Once You Know Your Size

A size number tells you which box to check at checkout — it doesn't tell you which pair, from which store, actually looks or fits right on your feet. That's a different problem, and it's the one a cross-store wishlist with AI try-on is built for.

If you're still working out your measurements for an order beyond shoes, how to measure yourself for online shopping covers the rest of the body the same way this guide covers your feet.

Frequently Asked Questions

How can I find my shoe size at home without going to a store? +

Tape a sheet of paper to a hard floor, stand on it with your full weight in the socks you'd wear with the shoe, and trace around your foot holding the pen upright. Measure the length from heel to the tip of your longest toe and the width across the widest part of the foot, both in centimeters, then match those numbers to a shoe size chart. Measure both feet and size for the larger one.

Is tracing my foot on paper actually accurate? +

It's accurate enough to get within half a size for most people when done standing with full body weight on a hard surface, but it isn't a professional fitting. Sitting down, tracing on carpet, or holding the pen at an angle can all shrink the outline by several millimeters, which is enough to push you into the wrong size. Treat the result as a confident starting point, not a lab measurement.

What's the best time of day to measure my foot? +

Measure in the evening, since feet swell slightly over the course of a normal day from standing and walking and are typically at their largest by then. A morning measurement can read a few millimeters smaller than how your feet actually sit later in the day, especially if you're buying shoes you'll wear for long periods.

Do shoe sizes differ between US, UK, and EU, and does width matter? +

Yes to both. The US, UK, and EU each use different numbering scales for the same foot length, so a US size 9 is roughly a UK 8 and an EU 42-43 - and that's before brand-specific rounding. Width matters just as much as length: two people with the same foot length but different widths (narrow, medium, or wide) need different shoes even at the identical size number, which is why width is worth measuring alongside length, not skipping.

Does Spree help with shoe sizing? +

Not by measuring your foot - Spree is upfront about that. Its job starts once you have a size: save shoes you're considering from any store into one wishlist, compare them side by side, and use AI Virtual Try-On on your own photo to see how a sneaker, boot, or heel actually looks on your feet before you order. It won't give you a size number, but it's the best way to narrow down which pair to size for in the first place.

The Bottom Line

Finding your shoe size at home is a solved problem — a sheet of paper, a hard floor, and a conversion chart get you within half a size, which is close enough to order with real confidence. Standing instead of sitting, measuring width alongside length, and checking the specific brand's chart are the quiet variables that actually matter more than which trick you use to trace.

Once you have that number, the harder decision is usually which pair, from which store, actually looks and fits right — and that's where comparing real candidates from different retailers side by side, and previewing each one on your own feet with AI try-on, saves far more regret than the measuring step ever did.