Measuring your bra size correctly is essential for finding a comfortable, supportive fit. All you need is a soft measuring tape and two simple measurements: underbust (band size) and fullest bust (cup size).
This section explains how to measure at home, with or without a measuring tape, and how to adjust for posture, weight changes, pregnancy, or hormonal shifts.
If you’ve searched, “How do I measure my bra size at home?”, follow the step-by-step instructions here before using the bra size calculator for a final size estimate.
Accurate measurement reduces common fit problems and increases long-term comfort.
You need both, not one instead of the other. The measuring tape provides the raw band-and-bust numbers that everything else depends on. The bra size calculator converts those numbers into an actual size — including sister-size alternatives that a tape reading alone can never surface. Most sizing…
In an internal analysis of 500 user-submitted measurement and fit reports on this site, checking a sister size alongside the primary calculated size raised the reported fit-match rate from roughly 6 in 10 to roughly 9 in 10 (61% → 89% in the raw counts — full caveats below). That’s directional…
UNIQLO 75/80 CD is designed to cover four conventional sizes: 75C, 75D, 80C and 80D. In US and UK band numbering, those are approximately 34C, 34D, 36C and 36D. The number group 75/80 describes the two metric bands, while CD describes the two cup letters included in the molded wireless cup range.
Australian bras are sized around even-number dress-size bands — AU 8, 10, 12, 14, 16, 18, 20 and up. The band conversion is consistent: AU 8 = US/UK 30, AU 10 = 32, AU 12 = 34, AU 14 = 36, AU 16 = 38. Cup letters are trickier. Mainstream Australian charts typically run A, B, C, D, DD, E, F, G,…
The best underwear for wide hips usually starts with the fullest-hip measurement, then solves waist looseness through better construction—not by forcing a smaller size over the hips. Prioritize a contoured waistband, a back panel with enough depth, flexible leg openings and a gusset that stays…
Measure the natural waist around the torso’s natural crease and the fullest hip around the widest level path across the hips and seat. Keep the tape parallel to the floor, close without compression and completely untwisted. Repeat both readings; when one number does not repeat, correct the tape…
To convert centimeters to inches, divide by 2.54. To convert inches to centimeters, multiply by 2.54. This 2.54 conversion factor is the internationally defined length of one inch, so it applies equally to underbust and full bust measurements. Measure first, then compare the converted number…
To measure chest for a gynecomastia bra, take two main measurements: under-chest and fullest chest. Measure snugly around the ribcage directly under the chest tissue, then measure around the fullest part of the chest, usually across the nipple line. Keep the tape level, relaxed and flat. For…
On the same band size, I cup is about 2 cup steps larger than G cup. In many standard systems, G commonly represents about a 8-inch bust-to-underbust difference while I represents about a 10-inch difference. Because this is a wider comparison, the smartest approach is to compare the middle…
To measure the male chest for a support garment, take two measurements: (1) wrap a flexible tape around the fullest part of the chest, across the nipple line, for your chest size; and (2) wrap the tape directly under the pectoral muscles around the ribcage for your underbust (band equivalent).…
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