Size calculator library
Clothing & Wearables Size Calculators
Turn body measurements into useful fit information for clothing, footwear, jewelry, eyewear and wearable accessories.
Labelled clothing sizes are not universal, so the most reliable starting point is your measurement profile. Use the calculator for the garment or accessory you are buying, then compare the result with the exact retailer or manufacturer chart when required.
Popular calculators
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What T-Shirt Size Do I Need
Find t-shirt sizing measurements from chest circumference, waist circumference, and shoulder-to-hem length.
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What Jacket Size Do I Need
Use your measurements for chest circumference, shoulder width, and sleeve length to find jacket size profile.
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What Jeans Waist Size Do I Need
Enter jeans-wearing waist circumference, hip circumference, and fabric stretch allowance to work out jeans waist sizing profile.
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What Shoe Size Do I Need
Use longest foot length, forefoot width, toe allowance to find shoe internal-size profile.
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What Ring Size Do I Need
Use finger circumference, ring sizing region to find ring circumference and inside diameter.
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What Bra Band Size Do I Need
Calculate bra band sizing measurement using snug underbust circumference and sizing region.
All Clothing & Wearables calculators
Everyday Clothing
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What Bra Band Size Do I Need
Calculate bra band sizing measurement using snug underbust circumference and sizing region.
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What Slipper Size Do I Need
Use your measurements for foot length, sock/comfort length allowance, and foot width to find slipper sizing measurements.
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What Trouser Size Do I Need
Calculate trouser sizing measurements using trouser waist circumference, hip circumference, and inside-leg length.
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What Sock Size Do I Need
Calculate sock sizing measurements using foot length and ball-of-foot circumference.
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What Jeans Length Do I Need
Use your measurements for barefoot inside-leg length, desired hem allowance for footwear, and break preference to find finished jeans inseam.
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What Jacket Size Do I Need
Use your measurements for chest circumference, shoulder width, and sleeve length to find jacket size profile.
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What Shoe Size Do I Need
Use longest foot length, forefoot width, toe allowance to find shoe internal-size profile.
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What Dress Size Do I Need
Use your measurements for bust circumference, waist circumference, and hip circumference to find dress sizing measurements.
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What Tie Width Do I Need
Use your measurements for jacket lapel width and tie-to-lapel width ratio to find tie width.
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What Safety Glasses Size Do I Need
Find safety-glasses dimensional fit from face width, temple length to ear, and bridge width.
Jeans, Underwear & Footwear
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What Shirt Size Do I Need
Calculate shirt sizing measurements using chest circumference, waist circumference, and shoulder width.
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What Hoodie Size Do I Need
Calculate hoodie sizing measurements using chest circumference, desired garment length, and sleeve length.
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What Watch Strap Size Do I Need
Find watch strap length from wrist circumference, watch lug-to-lug length, and strap overlap/buckle allowance.
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What Skirt Size Do I Need
Find skirt sizing measurements from natural waist circumference, full hip circumference, and desired skirt length.
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What Suit Size Do I Need
Find suit sizing measurements from chest circumference, waist circumference, and sleeve length.
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What Cap Size Do I Need
Use your measurements for head circumference, candidate adjustment minimum, and candidate adjustment maximum to find cap adjustment-range fit.
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What Scarf Length Do I Need
Calculate scarf length using neck circumference, desired wraps, and desired tail length each side.
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What Bracelet Size Do I Need
Enter wrist circumference, fit preference, and custom fit allowance to work out bracelet length.
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What T-Shirt Size Do I Need
Find t-shirt sizing measurements from chest circumference, waist circumference, and shoulder-to-hem length.
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What Belt Size Do I Need
Use circumference where belt sits, buckle/fit allowance, hole spacing to find belt centre-hole position.
Accessories & Formalwear
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What Apron Size Do I Need
Enter front chest width, waist circumference, and chest-to-knee desired length to work out apron size.
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What Wedding Dress Size Should I Order
Use your measurements for bust circumference, waist circumference, and hip circumference to find wedding dress order measurements.
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What Jeans Waist Size Do I Need
Enter jeans-wearing waist circumference, hip circumference, and fabric stretch allowance to work out jeans waist sizing profile.
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What Winter Glove Size Do I Need
Calculate winter glove sizing measurements using hand circumference, hand length, and extra circumference for liner.
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What Bra Cup Size Do I Need
Enter full bust circumference, snug underbust circumference, and sizing region to work out bra cup sizing measurements.
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What Dress Shirt Collar Size Do I Need
Enter neck circumference, collar ease allowance, and centre-back-to-wrist sleeve length to work out dress-shirt collar and sleeve size.
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What Beanie Size Do I Need
Use head circumference, beanie unstretched circumference, safe stretch fraction to find beanie stretch fit.
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What Sunglasses Size Do I Need
Enter temple-to-temple face width, nose bridge width, and frame fit to work out sunglasses frame-width and bridge target.
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What Face Mask Size Do I Need
Use nose bridge to under-chin length, cheek-to-cheek width, head circumference if head straps to find face-mask panel and strap targets.
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What Reading Glasses Frame Size Do I Need
Use your measurements for face width, pupillary distance, and bridge width to find reading-glasses frame sizing profile.
Occasionwear, Jewelry & Eyewear
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What Dressing Gown Size Do I Need
Use your measurements for chest circumference, hip circumference, and desired wrap overlap to find dressing gown size profile.
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What Baby Clothes Size Do I Need
Find baby clothing sizing profile from baby length/height, baby weight, and age in months.
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What Tie Length Do I Need
Enter collar-to-waist vertical distance, length consumed by knot, and rear blade/tail allowance to work out tie length.
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What Compression Sock Size Do I Need
Calculate compression sock sizing measurements using ankle circumference, calf circumference, and floor-to-knee length.
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What Underwear Size Do I Need
Find underwear sizing measurements from waist circumference and hip circumference.
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What Bridesmaid Dress Size Should I Order
Find bridesmaid dress measurements from bridesmaid bust circumference, bridesmaid waist circumference, and bridesmaid hip circumference.
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What Pyjama Size Do I Need
Find pyjama sizing measurements from chest circumference, waist circumference, and hip circumference.
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What Jumper Size Do I Need
Enter chest circumference, desired sweater ease, and sleeve length to work out jumper size profile.
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What Maternity Clothing Size Do I Need
Use your measurements for pre-pregnancy generic size index, current bust circumference, and current hip circumference to find maternity clothing sizing profile.
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What Sports Bra Size Do I Need
Use your measurements for underbust circumference, full bust circumference, and activity impact to find sports bra sizing profile.
Protective, Sleep & Family Clothing
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What Kids Clothing Size Do I Need
Calculate kids clothing sizing profile using child height, chest circumference, and waist circumference.
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What Glove Size Do I Need
Find glove sizing measurements from hand circumference around knuckles and wrist crease to fingertip.
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What Ring Size Do I Need
Use finger circumference, ring sizing region to find ring circumference and inside diameter.
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What Waistcoat Size Do I Need
Enter chest circumference, waist circumference, and desired front length to work out waistcoat sizing measurements.
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What Necklace Length Do I Need
Use neck circumference, desired drop below base of neck, chain path geometry factor to find necklace length.
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What Thermal Base Layer Size Do I Need
Enter chest circumference, waist circumference, and hip circumference to work out thermal base-layer sizing measurements.
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What Smart Ring Size Do I Need
Calculate smart ring inside diameter using finger circumference, fit allowance, and manufacturer sizing offset.
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What Hat Size Do I Need
Enter head circumference to work out hat sizing measurement.
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What Blazer Size Do I Need
Calculate blazer sizing measurements using chest circumference, shoulder width, and sleeve length.
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What Coat Size Do I Need
Find coat size profile from chest circumference, hip circumference, and sleeve length.
Measure first
Measure over the clothing or underlayers you will actually wear where relevant, keep the tape level without pulling it tight, and recheck brand-specific sizing before ordering items that use letter or regional sizes.