# SizeFit - International Size Converter

> Free online size converter for shoes, clothing, pants (waist, inseam, international labels), bras, rings, hats, mattresses, and bedding. Convert between US, UK, EU, Asian sizes instantly. Includes brand size charts (Nike, Adidas, New Balance), kids conversion tools, baby diaper size charts by weight (Pampers/Huggies reference), airline luggage comparison charts, and comprehensive measurement guides.

SizeFit is a comprehensive size conversion platform that helps users convert sizes across different international standards. The website provides accurate conversion tools, detailed size charts, and step-by-step measurement guides for footwear, apparel (including trousers and jeans), accessories, home goods, travel carry-on dimensions, and parent-focused sizing references such as disposable diaper weight bands.

## Conversion Tools

- [Shoe Size Converter](https://sizefit.org/shoe-size-converter): Convert men's and women's shoe sizes between US, UK, EU, Japanese, and CM measurements
- [Kids Shoe Size Converter](https://sizefit.org/kids-shoe-size-converter): Kids/boy/girl shoe converter—baby & toddler (C) and youth (Y); links to baby/toddler chart
- [Brand Shoe Size Converter](https://sizefit.org/brand-shoe-converter): Compare shoe sizes across major brands: Nike, Adidas, New Balance, Converse, Vans, and more
- [Men's to Women's Shoe Size Converter](https://sizefit.org/mens-womens-shoe-size-converter): Convert between men's and women's shoe sizes with accurate US, UK, EU, and CM measurements
- [Clothing Size Converter](https://sizefit.org/clothing-size-converter): Convert clothing sizes with detailed measurement guidance for perfect fit across US, EU, UK, and Asian standards
- [Pants Size Converter](https://sizefit.org/pants-size-converter): Convert waist and inseam (inch/cm); match verified pant label rows—confirm on the retailer chart
- [Kids Clothing Size Converter](https://sizefit.org/kids-clothing-size-converter): Convert children's clothing sizes with height, weight, and age reference
- [Bra Size Calculator](https://sizefit.org/bra-size-calculator): US/UK/EU bra size calculator—band, cup, and sister sizes from measurements
- [Top Size Converter](https://sizefit.org/top-size-converter): Shirt size calculator from chest/bust, waist, hips—Nike, Adidas, Gap, H&M, Plus mode
- [Ring Size Converter](https://sizefit.org/ring-size-converter): Convert mm circumference/diameter or US/UK/EU labels after you measure
- [Hat Size Converter](https://sizefit.org/hat-size-converter): Convert head circumference (in/cm) to fitted fractions (7 1/4), US, UK, and EU
- [Mattress Size Converter](https://sizefit.org/mattress-size-converter): King 76×80 & Queen 60×80—compare Twin/Full and international sizes + room fit
- [Luggage Size Checker](https://sizefit.org/luggage-size-checker): Interactive carry-on and personal-item size checker against common airline limits
- [Printable Ring Sizer](https://sizefit.org/printable-ring-sizer): Free printable ring size chart to measure at home (print at 100% scale)

## Quick Conversion Pages

- [All conversion shortcuts](https://sizefit.org/convert): Index of dedicated shoe and clothing conversion landing pages
- [US to UK Shoe Size](https://sizefit.org/convert/us-to-uk-shoe-size): Convert US shoe sizes to UK sizes
- [US to EU Shoe Size](https://sizefit.org/convert/us-to-eu-shoe-size): Convert US shoe sizes to EU sizes
- [UK to US Shoe Size](https://sizefit.org/convert/uk-to-us-shoe-size): Convert UK shoe sizes to US sizes
- [EU to US Shoe Size](https://sizefit.org/convert/eu-to-us-shoe-size): Convert EU shoe sizes to US sizes
- [JP to US Shoe Size](https://sizefit.org/convert/jp-to-us-shoe-size): Convert Japanese shoe sizes to US sizes
- [CN to US Shoe Size](https://sizefit.org/convert/cn-to-us-shoe-size): Convert Chinese shoe sizes to US sizes
- [US Trainers to UK Size](https://sizefit.org/convert/us-trainers-to-uk-size): Convert US trainers/sneakers to UK sizes
- [EU to US Clothing Size](https://sizefit.org/convert/eu-to-us-clothing-size): Convert EU clothing sizes to US sizes
- [UK to US Clothing Size](https://sizefit.org/convert/uk-to-us-clothing-size): Convert UK clothing sizes to US sizes
- [Asian to US Clothing Size](https://sizefit.org/convert/asian-to-us-clothing-size): Convert Asian clothing sizes to US sizes
- [JP to US Clothing Size](https://sizefit.org/convert/jp-to-us-clothing-size): Convert Japanese clothing sizes to US sizes

## Size Charts

- [All Size Charts](https://sizefit.org/charts): Comprehensive collection of all size charts
- [Shoe Size Charts](https://sizefit.org/charts/shoe-size): Detailed shoe size charts by country and brand
- [Brand Shoe Size Charts](https://sizefit.org/charts/shoe-size/nike): Official sizing charts for Nike, Adidas, New Balance, and other major brands
- [Bra Size Charts](https://sizefit.org/charts/bra-size): Bra cup & band chart plus sister size chart (34C≈32D≈36B)
- [Clothing Size Charts](https://sizefit.org/charts/clothing-size): US/UK/EU/JP clothing size chart hub + brand tops & jeans
- [Pants Size Chart](https://sizefit.org/charts/pants-size): Men's & women's pants size chart—W×L meaning, waist cm, inseam (L) reference
- [Plus Size Clothing Chart](https://sizefit.org/guides/plus-size-clothing-size-chart): Plus size shirt (bust/chest US 14+) & pants (waist/hip) + XXL–XXXL
- [Shirt Size Chart](https://sizefit.org/guides/shirt-size-chart): Men/women/youth shirt size chart—M/XL chest cm, EU numbers, measure guide
- [Hat Size Charts](https://sizefit.org/charts/hats): Hat size chart hub—fitted (7 1/4), cowboy, crochet, universal; inches & cm
- [Ring Size Charts](https://sizefit.org/charts/ring-size): US/UK/EU chart with diameter & circumference in mm; jump to size 10/11, EU ~52/54
- [Men's Ring Size Charts](https://sizefit.org/charts/mens-ring-size): Men's chart—average near US 9; common range US 8–10.5
- [Blanket Size Charts](https://sizefit.org/charts/blanket-size): King (108×90), queen (90×90), twin/full/throw sizes in inches & cm; 50×60 lookup
- [Mattress Size Charts](https://sizefit.org/charts/mattress-size): King 76×80 in, Queen 60×80, Full, Twin—inches & cm + UK notes
- [Bed Sheet Size Chart](https://sizefit.org/charts/bed-sheet-size): Fitted and flat sheet dimensions for Twin, Full, Queen, King, and California King; links to related nursery guides including diaper sizing by weight

## Measurement Guides

- [How to Measure Shoe Size](https://sizefit.org/guides/how-to-measure-shoe-size): 4 accurate steps—trace foot, measure length & width, match a chart
- [How to Measure Bra Size](https://sizefit.org/guides/how-to-measure-bra-size): Measure for bra size in 3 steps (underbust, standing bust, leaning)
- [How to Measure Ring Size](https://sizefit.org/guides/how-to-measure-ring-size): Measure ring size at home—string, existing ring, printable sizer (4 methods)
- [How to Measure Hat Size](https://sizefit.org/guides/how-to-measure-hat-size): 3 steps + circumference→size (22"/23" answers)
- [How to Measure Body Size](https://sizefit.org/guides/how-to-measure): Comprehensive guide to measuring your body for clothing
- [How to Measure Pants Size](https://sizefit.org/guides/how-to-measure-pants-size): Measure waist & inseam at home; decode W×L; link plus pants chart

## Travel & Luggage

- [Airline Carry-On Size Comparison](https://sizefit.org/charts/airline-carry-on-size-comparison): Side-by-side airline carry-on dimensions
- [Airline Personal Item Size Comparison](https://sizefit.org/charts/airline-personal-item-size-comparison): Personal item size limits by airline
- [Checked Bag Linear Size by Airline](https://sizefit.org/charts/checked-bag-linear-size-by-airline): Checked baggage linear inch/cm rules reference
- [Luggage Inch to CM Converter Table](https://sizefit.org/charts/luggage-size-inch-to-cm-converter-table): Suitcase dimension reference in inches and centimeters
- [Carry-On Luggage Size Guide](https://sizefit.org/guides/carry-on-luggage-size): Practical guide to carry-on limits and measuring bags
- [How to Measure Luggage Size](https://sizefit.org/guides/how-to-measure-luggage-size): Step-by-step luggage measurement tips

## Brand-Specific Guides

- [Nike Shoe Size Chart](https://sizefit.org/guides/nike-shoe-size-chart): Nike men/women/kids US·UK·EU; true to size; AF1 often 0.5 large
- [Adidas Shoe Size Chart](https://sizefit.org/guides/adidas-shoe-size-chart): Adidas men/women/kids US·UK·EU·CM; Ultraboost & Nike comparison
- [New Balance Shoe Size Chart](https://sizefit.org/guides/new-balance-shoe-size-chart): Complete New Balance shoe size conversion guide
- [Shoe Brands List](https://sizefit.org/guides/shoe-brands-list): Popular shoe brands by category with sizing and fit notes
- [Brand Shoe Size Charts](https://sizefit.org/guides/brand-shoe-size-charts): Official sizing for Nike, Adidas, and more
- [Chinese Shoe Size Chart](https://sizefit.org/guides/chinese-shoe-size-chart): Complete Chinese shoe size conversion guide
- [EU to US Shoe Size Chart](https://sizefit.org/guides/eu-us-shoe-size-chart): Comprehensive EU to US shoe size conversion chart

## Specialized Guides

- [Shoe Size Conversion Chart](https://sizefit.org/guides/shoe-size-conversion-chart): Complete shoe size conversion reference
- [Printable Shoe Size Chart](https://sizefit.org/guides/printable-shoe-size-chart): Download and print shoe size charts
- [Shoe Size Chart by Age](https://sizefit.org/guides/shoe-size-chart-by-age): Find shoe sizes based on age
- [Toddler Shoe Size Chart by Age](https://sizefit.org/guides/toddler-shoe-size-chart-by-age): Baby & toddler shoe size chart—US 1C–10C, boy/girl same chart, age guide
- [Kids to Women's Shoe Size Conversion](https://sizefit.org/guides/kids-to-womens-shoe-size-conversion): Big kids 7 = women's 8.5; women's 6/7 → youth; foot-length chart
- [Kids Size Chart](https://sizefit.org/guides/kids-size-chart): Kids clothing by age, youth XS–XL, and kids shoe size chart hub (Nike, Adidas, NB, Skechers)
- [Men Women Shoe Size Conversion](https://sizefit.org/guides/men-women-shoe-size-conversion): Understand the difference and convert between men's and women's shoe sizes
- [Foot Length to Shoe Size](https://sizefit.org/guides/foot-length-to-shoe-size): Convert foot length measurements to shoe sizes
- [Shoe Width Size Chart](https://sizefit.org/guides/shoe-width-size-chart): D vs 2E letter tables for men and women (2E wider than D)
- [Shoe Size Width Measurements](https://sizefit.org/guides/shoe-size-width-measurements): What D means, D vs 2E (~3/8 in), measure width + converter
- [Average Shoe Size](https://sizefit.org/guides/average-shoe-size): Learn about average shoe sizes by gender and region
- [Celebrity Shoe Sizes](https://sizefit.org/guides/celebrity-shoe-sizes): NBA and celebrity shoe sizes including Wembanyama and Shaq
- [Victor Wembanyama Shoe Size](https://sizefit.org/guides/victor-wembanyama-shoe-size): Victor Wembanyama US 20.5–22 shoe size guide
- [Shaq Shoe Size](https://sizefit.org/guides/shaq-shoe-size): Shaq wears US 22–23 (~15 in), UK 20, EU 56

## Bra Guides

- [How to Scoop and Swoop Bra](https://sizefit.org/guides/how-to-scoop-and-swoop-bra): Step-by-step guide to scooping and swooping your bra
- [Bra for Breast Shape](https://sizefit.org/guides/bra-for-breast-shape): Complete guide to finding the best bra for your breast shape
- [How to Choose Bra for Any Dress Style](https://sizefit.org/guides/how-to-choose-bra-for-any-dress-style): Guide to selecting the right bra for different dress styles
- [Push-Up Bra Guide](https://sizefit.org/guides/push-up-bra-guide): Complete guide to push-up bras
- [Sports Bra Guide](https://sizefit.org/guides/sports-bra-guide): Guide to choosing the right sports bra
- [Strapless Bra Guide](https://sizefit.org/guides/strapless-bra-guide): Complete guide to strapless bras
- [Underwire Bra Guide](https://sizefit.org/guides/underwire-bra-guide): Guide to underwire bras

## Hat Guides

- [Snapback Hat Sizes](https://sizefit.org/guides/snapback-hat-sizes): Snapback vs fitted chart (7 1/4) + Flexfit notes
- [Fitted Hat Size Chart](https://sizefit.org/charts/hats/fitted-baseball): US fitted fractions with head circumference in/cm
- [Cowboy Hat Size Chart](https://sizefit.org/charts/hats/cowboy): Western hat sizes from head circumference

## Home & Baby Guides

- [Baby Blanket Size](https://sizefit.org/guides/baby-blanket-size): Size of a baby blanket—receiving, swaddle, crib inches & cm
- [Baby Quilt Size](https://sizefit.org/guides/baby-quilt-size): Complete guide to baby quilt sizes with standard dimensions and safety tips
- [Diaper Size Chart by Weight](https://sizefit.org/guides/diaper-size-chart): Size 1 = 8–14 lb; Newborn–Size 7; nappy pants use same Size 3–6 weight bands; Huggies & Pampers
- [How to Choose Mattress Size](https://sizefit.org/guides/how-to-choose-mattress-size): How to choose—King 76×80, Queen 60×80, room & sleeper tips
- [Mattress Size Comparison Guide](https://sizefit.org/guides/mattress-size-comparison-guide): Twin vs Full vs Queen vs King dimensions in inches
- [Memory Foam vs Hybrid Mattress](https://sizefit.org/guides/memory-foam-vs-hybrid-mattress): 2026 construction comparison (support cores, layers, thickness, motion, airflow) with links to mattress sizes and sheet pocket depth

## Brand Sizing

- [Brand Sizing Guide](https://sizefit.org/guides/brand-sizing): Comprehensive guide to brand-specific sizing

## Information Pages

- [About Us](https://sizefit.org/about): Learn more about SizeFit
- [Contact](https://sizefit.org/contact): Get in touch with us
- [Privacy Policy](https://sizefit.org/privacy): Our privacy policy
- [Terms of Service](https://sizefit.org/terms): Terms of service

## Data Sources

All size conversion data is based on official size standards from international organizations and verified brand sizing charts. The website provides accurate conversions for:

- **Footwear**: US, UK, EU, Japanese (JP), Chinese (CN), and CM measurements
- **Clothing**: US, UK, EU, and Asian size standards
- **Pants**: Verified international label rows (with retailer citations where published), plus mathematical inch/cm conversion for waist and inseam—EU denim labeling varies by country and brand
- **Bras**: US, UK, EU band and cup sizes
- **Rings**: US, UK, EU, Japanese standards and millimeter measurements
- **Hats**: US, UK, EU sizes and CM/IN measurements
- **Mattresses**: US, UK, Australian, New Zealand, and European standards
- **Baby disposables**: Typical US diaper size labels vs baby weight (reference only; follow each brand's current packaging)

## Features

- **Accurate Conversions**: Based on official size standards and real user data
- **Global Standards**: Support for US, UK, EU, Asian, and other international sizes
- **Brand-Specific Charts**: Detailed sizing information for major brands
- **Measurement Guides**: Step-by-step instructions for accurate measurements
- **Kids Sizing**: Specialized tools for children's sizes with age references
- **Parent Guides**: Baby blanket/quilt dimensions and diaper size-by-weight charts with brand reference tables
- **Pants Tools**: Waist/inseam unit conversion, verified label matching, static chart page, and measurement how-to
- **Travel**: Luggage checker and airline size comparison charts with measurement guides
- **Free to Use**: All tools and charts are completely free
- **Mobile-Friendly**: Responsive design works on all devices