Convert shoe sizes, clothing sizes, and ring measurements between US, UK, EU, and Japanese systems. Includes a Roman numeral converter.
International shopping and specifications require understanding different sizing systems. Shoe sizes vary dramatically between US, UK, and EU standards, clothing sizes differ by region and gender, ring measurements use multiple systems, and historical documents use Roman numerals that need decimal conversion.
These converters translate sizing systems used across countries and industries. Convert shoe sizes between US Men/Women, UK, EU, and centimeter measurements, clothing sizes for international apparel shopping, ring sizes for jewelry, and Roman numerals for dates and numbering.
Suited for online shoppers buying internationally, travelers purchasing abroad, jewelry buyers, fashion professionals, historians working with dates, and anyone navigating international sizing standards.
Step-by-step guidance and best practices for getting the most out of this collection
Shoe size conversion accounts for different measurement systems and gender differences. US sizing differs for men and women (US Men 10 = US Women 11.5 roughly), UK sizing runs different from US (US Men 10 = UK 9.5), EU uses length-based numbering (EU 43-44 for US Men 10), and CM measures actual foot length (27-28 cm for US Men 10). The Shoe Size Converter handles these variations. Always measure both feet and use the larger measurement, as feet differ slightly. Width fittings (narrow, medium, wide) are separate from length sizing. Try shoes on when possible, as sizing varies by brand and style.
Clothing size conversion navigates US numeric sizing (2, 4, 6), UK sizing (6, 8, 10), EU sizing (34, 36, 38), and international letter sizing (XS, S, M, L, XL). US Women size 8 roughly equals UK 12 and EU 40. Men's sizing uses chest/waist measurements more consistently across regions but still varies. The Clothing Size Converter provides approximations since brands and cuts differ significantly. Vanity sizing (labeling larger sizes as smaller numbers) complicates conversions. Always check brand-specific size charts and measure key dimensions (bust, waist, hips, inseam) against charts.
Ring size conversion transforms between US numeric sizing (4-13), UK/Australian letter sizing (H-Z), European numeric sizing (44-70), and millimeter diameter measurements. US size 7 equals UK size N, EU size 54, or 17.3mm inner diameter. The Ring Size Converter helps purchase rings internationally or resize existing rings. Ring size varies between fingers and changes with temperature, time of day, and weight fluctuations. Measure at end of day when fingers are largest. Wide bands fit tighter than thin bands at the same size. Professional jewelers measure accurately with sizing tools.
Roman numeral conversion translates ancient Roman notation (I, V, X, L, C, D, M) to Arabic numbers (1, 5, 10, 50, 100, 500, 1000). The Roman Numeral Converter handles values up to thousands. Basic rules: additive notation places larger values left (VI = 6), subtractive notation places smaller left (IV = 4). Common uses include dates (MMXXV = 2025), outlines (I, II, III), book chapters, clock faces, and historical documents. Super Bowl numbers use Roman numerals. No zero exists in Roman system, complicating some calculations.
Convert shoe sizes across international systems
Convert clothing sizes for international shopping
Convert ring sizes and measurements
Convert historical and modern numbering
Common ways professionals use these tools together
Measure foot length in centimeters
Shoe Size Converter
Convert to retailer's sizing system
Shoe Size Converter
Check brand size chart if available
Shoe Size Converter
Measure existing ring in millimeters
Ring Size Converter
Convert to jeweler's sizing system
Ring Size Converter
Account for ring width if known
Ring Size Converter
Identify Roman numeral date
Roman Numeral Converter
Convert to standard numeric date
Roman Numeral Converter
Everything you need to know about sizing converter tools
Collections that complement and enhance your current selection
Convert length, weight, volume, and area between metric and imperial. Includes inches to cm, miles to km, feet to meters, and kg to pounds.
Convert Celsius to Fahrenheit, work across time zones, transform Unix timestamps into dates, and turn modern dates into Roman numeral notation.
Convert data sizes between bytes, KB, MB, GB, and TB; data transfer rates between bps and Gbps; and numbers between binary, hex, and decimal.
Convert cooking measurements, gas marks, baking ingredients, torque, pressure, fuel efficiency, engine displacement, power units, and paper sizes.
Convert cooking measurements, gas marks, baking ingredients, torque, pressure, fuel efficiency, engine displacement, power units, and paper sizes.
Compute mortgages, loans, and investment returns. Calculate principal, interest, and monthly installments for reliable personal financial planning.
Discover additional tools and resources to expand your toolkit
QR code, barcode, and VIN generators with custom logos, colors, error-correction levels, and 17-character VIN check-digit validation built in.
Convert colors between HEX, RGB, HSL, CMYK, LAB, and XYZ. Includes a CIELAB calculator with six-decimal precision for design and print work.
Build UTM tracking links for campaign analytics, generate Open Graph share images, create social share links, and design quote card visuals.
Compute mortgages, loans, and investment returns. Calculate principal, interest, and monthly installments for reliable personal financial planning.
On-page SEO checker, canonical URL validator, SERP snippet preview, heading hierarchy mapper, anchor text optimizer, and keyword permutation builder.
Calculators for paint coverage, tile counts, carpet square footage, wallpaper rolls, concrete slabs, drywall sheets, decking, mulch, and gravel.
Explore our complete collection of free, browser-based tools for all your design and development needs.
Browse All Tools