Footwear sizing works best when you begin with an accurate foot measurement, compare it with the specific retailer's chart, and then adjust for width, shoe shape, materials, socks, and intended use. The tools and guides on this page help you make that comparison without treating a converted size as a guaranteed fit.
Direct answer
How to find your general shoe size
Measure both feet from heel to longest toe, use the larger result, and compare it with a shoe-size chart. A foot-length calculator can estimate a starting US, UK, or EU size, but the final choice should follow the chart for the exact brand and footwear style.
- Measure both feet while standing.
- Use the longer foot measurement.
- Add no manual allowance unless the brand instructs you to do so.
- Compare the measurement with the retailer's chart.
- Review width, materials, socks, and intended activity.
Footwear sizing hub
Choose a Footwear Size Tool
Start with foot length, then use the relevant conversion, width, and fit guidance for the footwear you plan to buy.
Foot Length to Shoe Size
Estimate a general US, UK, and EU starting size from measured foot length.
Open sectionWomen's Shoe Size Conversion
Compare common women's US, UK, and EU size labels.
Open sectionMen's Shoe Size Conversion
Compare common men's US, UK, and EU footwear sizes.
Open sectionChildren's Shoe Size Guidance
Use foot length as the primary signal for children's footwear.
Open sectionShoe Width Guidance
Review width, toe-box, and pressure-point checks before ordering.
Open sectionOnline Shoe Fit Checklist
Combine measurement, style, materials, reviews, and returns information.
Open sectionGeneral starting-size estimator
Foot Length to Shoe Size Calculator
Enter foot length and choose an adult sizing category. The result is a general estimate, not a replacement for a brand-specific size chart.
Estimated starting sizes
Compare this estimate with the brand's chart and review width, toe-box shape, materials, and socks.
Why Foot Length Is the Best Starting Measurement
A labeled shoe size is a shorthand category. Foot length is a physical measurement that can be compared with the internal dimensions or recommended foot-length range supplied by a brand. That makes it more useful than relying only on the size printed inside an older pair of shoes.
Foot length still does not describe the whole foot. Two people with the same heel-to-toe measurement can need different shoes because of width, instep height, toe shape, arch structure, and overall foot volume. Measurement reduces uncertainty, but fit must still be evaluated as a combination of several signals.
Measurement visual
Measure from Heel to Longest Toe
Stand with your heel lightly touching a wall and measure the longer foot in a straight line.
How to Measure Foot Length Correctly
Measure near the end of the day when your feet may be slightly larger than they are in the morning. Wear the type of socks you expect to use with the shoes, especially when measuring for boots, athletic shoes, or winter footwear.
- Place a sheet of paper on a hard floor with one edge against a wall.
- Stand on the paper with the heel lightly touching the wall.
- Keep your weight distributed naturally across the foot.
- Mark the position of the longest toe.
- Measure from the paper edge at the wall to the toe mark.
- Repeat the process for the other foot.
- Use the larger measurement when comparing sizes.
Do not curl your toes, lean away from the measured foot, or measure only while sitting. Standing allows the foot to spread under normal body weight and usually provides a more realistic shopping measurement.
Foot Length Is Not the Same as Shoe Interior Length
A shoe normally needs more internal length than the measured foot. That extra room supports toe movement, walking mechanics, and normal expansion during activity. The amount of additional space varies by footwear type and by the shape of the front of the shoe.
Do not automatically add a fixed amount to your foot measurement unless the retailer's instructions tell you to do so. Many brand charts already account for the intended allowance. Adding more length yourself can cause you to select a shoe that is unnecessarily large.
Women's US, UK, and EU Shoe Size Chart
The table below provides general adult women's conversions. Treat it as a quick reference rather than a universal standard.
| US | UK | EU | Approximate foot length |
|---|---|---|---|
| 5 | 3 | 35.5 | 22 cm |
| 6 | 4 | 36.5 | 23 cm |
| 7 | 5 | 38 | 24 cm |
| 8 | 6 | 39 | 25 cm |
| 9 | 7 | 40.5 | 26 cm |
| 10 | 8 | 42 | 27 cm |
| 11 | 9 | 43 | 28 cm |
Men's US, UK, and EU Shoe Size Chart
The following table gives general adult men's conversions. Individual brands may round or grade sizes differently.
| US | UK | EU | Approximate foot length |
|---|---|---|---|
| 6 | 5 | 39 | 24 cm |
| 7 | 6 | 40 | 25 cm |
| 8 | 7 | 41 | 26 cm |
| 9 | 8 | 42.5 | 27 cm |
| 10 | 9 | 44 | 28 cm |
| 11 | 10 | 45 | 29 cm |
| 12 | 11 | 46 | 30 cm |
Why Shoe Size Conversions Are Approximate
US, UK, and EU footwear systems do not share one perfectly aligned scale. Conversion charts translate between systems by using common industry relationships and rounding to available retail sizes. The result is useful for orientation, but it cannot guarantee identical internal dimensions.
A converted EU size may correspond to more than one nearby US size, depending on the chart. Half sizes may also be handled differently. For that reason, the most reliable sequence is measurement first, conversion second, and brand-chart verification third.
Children's Shoe Sizing Requires Current Measurements
Children's feet can grow quickly, so a size based on age or an older pair of shoes may no longer be useful. Measure both feet before ordering and check whether the retailer's chart uses foot length, insole length, age ranges, or a combination of these.
Allowing some growing room can be useful, but shoes that are excessively long or wide may reduce stability and alter walking. The correct amount depends on the footwear and the child's movement needs.
Shoe Width Can Matter as Much as Length
A shoe can have adequate toe-to-heel length and still feel too small because it compresses the sides of the forefoot or presses across the instep. Moving to a longer size may create heel slip without solving the width problem.
Possible length problem
Toes reach the front
The longest toe touches or presses into the front during standing or walking.
Possible width problem
Side pressure without toe contact
The foot feels compressed across the widest area even though there is enough space in front.
Possible volume problem
Pressure across the top
The shoe presses over the instep or laces feel excessively tight despite adequate length.
How Shoe Style Changes the Best Starting Size
Running and walking shoes
Athletic footwear needs room for movement and foot expansion. Check the brand's activity-specific instructions and wear the socks you expect to use during exercise when measuring and testing fit.
Dress shoes
Dress shoes may use narrower toe shapes, firmer materials, and different internal volumes. A long pointed toe does not necessarily provide usable toe room because the foot may sit farther back in the shoe.
Boots
Boots may need to accommodate thicker socks, structured uppers, and different heel behavior. Check both foot length and calf or ankle measurements when the product includes a fitted shaft.
Sandals
Sandals expose more of the foot, but the heel and toes should still sit securely on the footbed. Straps should hold the foot without cutting into the skin or allowing excessive movement.
Online Shoe Size Checklist
Measure both feet
Use the longer result as the starting measurement.
Open the product chart
Use the exact retailer or brand chart for the selected style.
Check width options
Look for narrow, standard, wide, or extra-wide availability.
Read material details
Structured materials may adapt less than soft or flexible uppers.
Review fit comments
Use repeated patterns in reviews rather than one isolated opinion.
Check the return policy
Confirm the exchange window before ordering an unfamiliar brand.
Common Shoe Sizing Mistakes
- Ordering from the size label of an old shoe without measuring.
- Measuring only one foot.
- Measuring while sitting instead of standing.
- Assuming every conversion chart is identical.
- Using age alone to choose a child's shoe size.
- Choosing a longer shoe when width is the real problem.
- Ignoring the socks or orthotics that will be worn.
- Assuming a shoe will stretch enough to correct major pressure.
- Skipping the brand's return and exchange policy.
What to Do When Two Measurements Suggest Different Sizes
Foot length may suggest one size while width or instep volume suggests another. Begin by checking whether the shoe is available in more than one width. Selecting a wider version can be better than increasing length when the toes already have adequate room.
When the footwear has a narrow toe box, rigid upper, or thick lining, the safer starting size may differ from a flexible, open, or adjustable style. Product shape and construction should be considered alongside the numeric result.
Continue the footwear cluster
Related Footwear Sizing Guides
Use these supporting guides to measure more accurately, compare size systems, understand width, and evaluate fit before ordering.
How to Measure Foot Length
Measure both feet accurately using paper, a wall, and a ruler.
How Shoe Sizing Works
Understand how foot length, shoe lasts, width, and brand grading affect size.
US, UK, and EU Shoe Size Conversion
Compare common footwear sizing systems without assuming every chart is identical.
What to Do When Between Shoe Sizes
Choose a safer starting size based on shoe type, width, socks, and fit preference.
Why Shoe Sizes Vary Between Brands
Learn why the same labeled size can fit differently across brands and styles.
How Should Shoes Fit?
Check toe room, heel movement, width, pressure points, and walking comfort.
How to Choose Shoe Size Online
Use measurements, retailer charts, reviews, and return policies before ordering.
Children's Shoe Size by Age
Use age only as a rough reference and prioritize current foot measurements.
Wide vs. Standard Shoe Width
Understand width labels and signs that standard-width shoes may be too narrow.
How Socks Affect Shoe Fit
See how sock thickness changes internal space and the best starting size.
Foot Length vs. Shoe Insole Length
Learn why shoe interiors need more length than the measured foot.
Signs Your Shoes Are the Wrong Size
Identify toe pressure, heel slip, side pressure, instability, and excess space.
Questions and answers
Footwear Size FAQs
How do I calculate my shoe size from foot length?
Measure the longer foot from the back of the heel to the tip of the longest toe, then compare that measurement with the specific brand's size chart. A general converter can provide a starting point, but the retailer's chart should control the final decision.
Should I measure both feet?
Yes. Many people have one foot that is slightly longer or wider than the other. Use the larger measurement when selecting a starting shoe size.
Are US, UK, and EU shoe conversions exact?
No. Conversion charts are approximate because sizing formulas, rounding, shoe lasts, and brand grading differ. Always compare the converted result with the brand's own chart.
Should I size up when I am between shoe sizes?
Sizing up is often the safer starting point when length is the main issue, but width, shoe construction, material, socks, and intended activity can change the decision.
How much room should be in front of the toes?
A comfortable shoe normally needs some space beyond the longest toe so the foot can move naturally. The correct amount depends on the footwear type, activity, and shape of the toe box.
Why does the same shoe size fit differently between brands?
Brands use different lasts, internal shapes, grading methods, materials, and fit targets. Two shoes with the same labeled size may have different usable length, width, and volume.
Does shoe width affect the size I need?
Yes. A shoe that is too narrow may feel too small even when its length is adequate. A wider version of the same length can sometimes fit better than moving to a longer size.
Can I use an insole to determine shoe size?
An insole can help compare footwear that already fits, but insole measurements are not identical to foot length. Shoes normally need extra internal space beyond the measured foot.