Size and Fit Calculators
20 calculators
Sizing across charts and regions: clothing, dress, bra, belt and glove conversions, plus body-measurement estimates. Sizing standards differ between brands and between countries, and vanity sizing is real, so treat the output as the nearest chart entry rather than a guaranteed fit and check the retailer's own table.
- Belt Size Estimator Estimate an inch-based belt length from your waist measurement.
- Bra Size Calculator Estimate a US bra size from bust and underbust measurements using a simplified convention.
- Clothing Letter Size Range Estimator View the modelled chest and waist measurement ranges for a selected letter size.
- Women's Clothing Size Reference Compare women’s US, UK, EU and Italy clothing size references using one published brand chart.
- Dress Size Calculator Estimate a US dress size reference from bust, waist and hip measurements.
- Glove Size Calculator Estimate glove size references from hand circumference in inches or centimetres.
- Hat Size Calculator Estimate numeric and letter hat size references from head circumference.
- Inseam Measurement Calculator Estimate your inside leg measurement from your height, or convert a measured inseam between inches and centimetres.
- Men’s Jacket Chest and Length Estimator Estimate a men’s chest-based jacket number and short, regular or long length code.
- Jeans Size Calculator Estimate a US W × L jeans reference from waist and inseam measurements.
- Jeans Waist Measurement Converter Convert a US W waist label to its inch and centimetre measurement equivalents.
- Kids Clothing Size Calculator Estimate a children’s height-size reference in 6 cm steps from 50 to 176 cm.
- Ring Size Measurement Estimator Estimate a US half-size reference from inside circumference or diameter in millimetres.
- Approximate Ring Size Converter Convert a US, EU circumference or Japan reference into a simplified US/UK/EU/Japan crosswalk.
- Shoe Size and Width Estimate Estimate rough US, UK, EU and Japan shoe references from foot length and width.
- Foot Length Shoe Size Converter Convert foot length into approximate men’s US, women’s US, UK, EU and Japan references.
- Sleeve Length Calculator Estimate shirt and jacket sleeve length from your height, or convert a measured sleeve between inches and centimetres.
- Men’s Suit Measurement Estimator Estimate a chest-based jacket number, trouser waist and S/R/L length reference.
- Thread Count Calculator Estimate woven thread count by adding warp ends and weft picks per inch. Ply-inclusive totals are shown separately because counting every ply can produce a different advertised number.
- Watch Case Size Planning Estimate Estimate case diameter, lug width and thickness from wrist circumference and a style setting.
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A body measurement, a garment measurement and a printed size label are different inputs. Some tools estimate a size from a measurement; others compare regional labels using a stated reference model. Start with the information you have and check the relevant brand or maker’s chart.
Estimate a reference size from measurements
Use foot length and width for a shoe estimate, waist and inseam for a jeans reference, or circumference and diameter for a ring estimate. Measurement units and fit adjustments matter; these outputs do not guarantee that a product will fit.
Convert an existing size label
Use a converter when you already know a regional label. Clothing crosswalks and ring-size models are references with specific assumptions, not universal standards. A jeans waist converter reports a measurement rather than a complete garment-size system.
Confirm fit with the actual product
Brands, cuts, stretch, intended ease and measurement methods vary. Compare the output with the product’s measurement chart and instructions; switching to a more detailed-looking size label does not make an approximate model exact.