Multi-System Conversion
Compare US, UK, EU, CM, and other published sizing systems, then verify the exact brand, model, category, width, and product chart.
AI Shoe Size Converter
Convert a measured foot across sizing systems, then verify the exact brand and model chart, width, activity, and return policy.
Quick answer: convert a measured foot, then verify the current brand chart
Provide foot length and width, units, region, category, brand, model, sock thickness, and intended activity. A conversion is an estimate: lasts, width labels, manufacturing, insoles, foot shape, and fit preference vary.
- Measure both feet while standing and use the larger relevant measurement.
- Check the exact brand and model chart, width system, reviews, and return policy.
- Do not infer medical fit; pain, orthotics, injury, or children need qualified advice.
Related Flowith routes: AI Virtual Fitting Room · AI Outfit Generator · AI Custom Sneaker Designer
Sizing evidence to compare
Photo-Based Measurement
A photo with a known reference can support a rough length and width estimate. Perspective, lens, foot position, crop, and reference placement can distort it.
Brand-Specific Guidance
Brands and models use different lasts and charts. Record the exact product and compare the current manufacturer's measurements instead of relying on a brand-wide rule.
Who is it for?
🌍
For International Shoppers
Buy shoes from any country with confidence. No more guessing what EU 42 means in US sizes.
👟
For Sneaker Collectors
Know your exact size across Nike, Jordan, Yeezy, and other brands for limited releases.
🎁
For Gift Buyers
Convert sizes accurately when buying shoes as gifts, even across different sizing regions.
AI Size Converter vs Traditional Charts
Static Charts
Flowith AI
Accuracy
Static size charts that don't account for brand variations.
Use regional conversion plus the current brand and model chart as an estimate.
Measurement Input
Requires manual measurement with rulers and paper.
A reference-object photo can provide a rough measurement that still needs manual verification.
Brand Recommendations
Generic conversions that ignore how different brands fit.
Ask for brand-specific questions, then confirm the exact current product chart.
Confidence Level
Uncertainty leads to returns and exchanges.
Fit notes can narrow choices but cannot guarantee comfort or prevent a return.
How to convert sizes in 3 steps?
1
Enter Your Size
Input your known shoe size or upload a foot photo for measurement.
2
Select Target System
Choose the sizing system you need—US, UK, EU, CM, or specific brands.
3
Get Recommendations
Receive converted sizes with fit notes and brand-specific adjustments.
Frequently Asked Questions
No fixed accuracy is promised. Perspective, lens distance, crop, foot position, socks, reference placement, and model behavior can change the estimate; verify with a ruler or fitting.
Brands and individual models use different lasts, width labels, materials, and charts. Check the exact manufacturer's current chart and product-specific fit information.
We support width conversions too—narrow, standard, wide, and extra-wide options for brands that offer them.
You can ask for a children's conversion, but age labels and systems vary. Measure the child safely, allow appropriate growth room, and verify the exact brand chart or professional fitting.
Compare both sizes using the exact model's length and width chart, socks, activity, foot shape, insoles, reviews, and return policy. Do not rely on one universal size-up or size-down rule.
Build a better sizing estimate today
Compare the estimate with the current product chart and real fit evidence.