Measurement Guides
Accurate measurement is the foundation of correct sizing. Whether you're converting foot length to shoe size or chest and waist to clothing size, starting with a reliable number in centimeters (or inches) removes guesswork and reduces returns. Size labels (US 9, EU 42, M, L) are derived from length or girth; if you don't know your current size in a given region, or if you're buying from a brand that only publishes cm, measuring gives you a universal input. This hub explains why measurement comes first, how foot and body measurements map to sizes, when to use cm versus inches, common measurement mistakes and how to avoid them, and when to re-measure versus relying on a converter. Below we link to converters, programmatic conversion pages, how-to articles, interactive calculators, and printable rulers and sheets—so you can measure once and use the result across any chart or tool.
Why Measurement Comes First
Size numbers (US 9, EU 42) are derived from length or girth. If you don't know your current size in a given region, or if you're buying from a brand that only publishes cm, measuring gives you a universal input. Foot length in cm maps to men's, women's, and kids' shoe sizes across regions; chest, waist, and hip in cm map to clothing sizes. Once you have those numbers, you can use any chart or converter. Measuring also catches changes: feet and body can change with age, weight, or activity, so re-measuring periodically improves accuracy.
How Foot and Body Measurements Map to Sizes
Foot length (heel to longest toe, in cm) is the standard input for shoe size conversion. Charts and formulas assign a US, UK, EU, or Japan size to each length (or half-length). Body measurements—chest, waist, hips, sometimes inseam and sleeve—are compared to a size chart's ranges to pick a clothing size. There is no single "official" mapping; different publishers and brands use slightly different tables. Our tools and charts use widely accepted reference data; for critical fits, compare your measurement to the brand's own chart when available.
When to Measure in CM vs Inches
Most international size charts and converters use centimeters. If you measure in inches, convert (1 inch = 2.54 cm) or use a tool that accepts both. Our Measurement Assistant and Foot Measurement Calculator support cm and inches. For consistency and to match EU/Asian charts, measuring in cm is simplest. Printable rulers and foot-measuring sheets on this site are in cm; print at 100% scale for accuracy.
Avoiding Common Measurement Mistakes
Measure feet in the evening when they're slightly larger; stand with weight even; use the larger foot. For clothing, keep the tape snug but not compressing, and parallel to the floor. Don't assume an old size is still correct. Using a stretched or inaccurate ruler, or measuring over thick clothing, skews results. Our How to Measure Your Feet and printable sheets walk you through step-by-step. Once you have a good number, store it and use it with any converter or chart.
When to Use a Converter vs Measuring Again
Use a converter when you already have a size in one region or a measurement in cm and need the equivalent size elsewhere. Use measurement when you've never sized yourself, your size may have changed, or you're switching to a system that relies on cm. If you're unsure, measure: it takes a few minutes and gives you a reliable baseline. Below we list converters, programmatic conversion pages, how-to guides, interactive calculators, and printables so you can measure once and convert with confidence.
Converters
Enter a measurement (e.g. foot length in cm) or an existing size to get US, UK, EU, and other equivalents. These tools use the same reference data as our programmatic conversion pages for consistency across the site.
Programmatic pages
Programmatic conversion pages offer one page per size or measurement (e.g. 26 cm to US, inch to EU). The index lists all such pages; sample links below cover common measurement-based conversions.
Articles & guides
Step-by-step guides explain how to measure your feet and body, how to measure in cm, and how to interpret width and fit. Use these before using a converter or calculator so you have accurate input.
Tools
Interactive calculators accept your foot length (and optionally width or circumference) and return shoe sizes; the Measurement Assistant handles both foot and body measurements. Use these for instant conversion after you have measured.
Printables
Printable foot measuring sheet, cm ruler, clothing measurement chart, and kids size guide let you measure at home with accurate references. Print at 100% scale for the ruler; use the sheets with our converters for full conversion.
Frequently Asked Questions
What is the best way to measure my foot for shoe size?
Place a piece of paper against a wall on a hard floor. Stand with your heel touching the wall and mark the tip of your longest toe. Measure from the wall to the mark in centimeters. Do both feet and use the larger value. Measure in the evening when feet are slightly larger. Our how-to-measure guides and printable foot sheet walk you through it.
Should I measure in centimeters or inches?
Centimeters are recommended because most international size charts and our converters use cm. If you have inches, multiply by 2.54 to get cm. Our Measurement Assistant and Foot Measurement Calculator accept both; the printable cm ruler is in cm—print at 100% scale for accuracy.
How do I measure my chest, waist, and hips for clothing?
Chest: around the fullest part, under the arms, tape horizontal. Waist: around your natural waist (above navel, below ribs). Hips: around the fullest part of your hips. Keep the tape snug but not compressing. Our printable clothing measurement chart and Measurement Assistant guide you step-by-step.
Why did my converted size change from last time?
Feet and body can change with weight, age, or activity. If you haven't measured recently, re-measure and use the new number. Also ensure you selected the correct gender and category (men's, women's, kids) in the converter, since the scales differ.
Can I use a printable ruler for accurate cm measurement?
Yes. We provide a printable cm ruler; print at 100% (actual size) with no scaling so the markings are true to scale. Use it with our foot measuring sheet or any length you need to measure. Check your print dialog for "Actual size" or "100% scale."
Master guide, region systems & brand comparisons
The master pillar covers all size systems in one place. Region pages explain EU, US, UK, and Japan shoe sizing in detail. Brand comparison pages compare Nike vs Adidas and Zara vs H&M fit and sizing.
Authority hub pages
These four hubs organize the same resources by theme: shoe sizing, clothing sizing, brand-specific guides, and measurement. Use the one that matches your task, or jump between them for converters, articles, tools, and printables.