What is C Cup Size? C Cup Bra Measurements in Inches & cm, 30C to 40C

In bra sizing, a C cup means your bust measures about 3 inches (7.5 cm) more than your band size. So "C cup" is not one fixed size: a 32C has a bust of about 35 inches and a 38C a bust of about 41 inches, because the cup letter only describes the difference between bust and band. C is the second most common cup size sold on Lovable India. Below is every C cup size from 30C to 40C with its measurements in inches and cm, how to check you are a C cup, which sizes hold the same cup volume, and which bra styles suit a C cup.

C cup size chart: 30C to 40C

Size	Underbust (inches)	Bust (inches)	Bust (cm)	Shop
30C	25–26	33	84	30 bras
32C	27–28	35	89	32C bras
34C	29–30	37	94	34C bras
36C	31–32	39	99	36C bras
38C	33–34	41	104	38C bras
40C	35–36	43	109	40C bras

Every row is a C cup, but the cups are not the same size: cup volume grows with the band, so a 38C cup holds noticeably more than a 32C cup. The band number is your underbust plus 4 (even) or 5 (odd) inches; the cup letter is bust minus band, where A is 1 inch, B is 2, C is 3, D is 4 and E is 5.

How to know if you are a C cup

Measure under your bust, snug, in inches, and convert to a band: add 4 if the number is even, 5 if it is odd.
Measure around the fullest part of your bust, loosely, without pressing.
Subtract the band from the bust. A difference of 3 inches is a C cup; 2 is B; 4 is D.

Example: underbust 29 inches gives band 34; bust 37 inches is 37 minus 34 = 3, so 34C. Use the bra size chart for every band or the bra size calculator to do the maths.

Is C cup big or small?

On Lovable India, C is the second most common cup after B; 34C and 36C are the best-selling C sizes. On its own, the letter says little about how a bust looks: a C cup on a 30 band is small, a C cup on a 40 band is full. C cup is one letter larger than B and one smaller than D: each letter adds one inch to the bust-minus-band difference.

C cup sister sizes

Sister sizes share the same cup volume on a different band. If your C cup bra fits in the cup but the band is tight, go up a band and down a cup; if the band rides up, go down a band and up a cup.

C cup size	Same cup, tighter band	Same cup, looser band
30C	–	32B
32C	30D	34B
34C	32D	36B
36C	34D	38B
38C	36D	40B
40C	38D	–

Best bra styles for C cups

C cups benefit from a little structure. Full-coverage and 3/4th-coverage bras with wider straps hold the shape; wired styles give lift under sarees and dresses; non-wired full-coverage styles are better for 10-hour days; padded t-shirt bras work well but choose thin padding, not push-up. Browse t-shirt bras, padded bras, non-padded bras, seamless bras, sports bras and full coverage bras, then filter to your C cup size.

C cup FAQs

What does C cup mean?

That your bust is about 3 inches (7.5 cm) larger than your band size. It is a difference, not a measurement, so the actual cup size depends on the band: 32C, 34C and 36C are all C cups of different sizes.

What is C cup size in cm?

The difference between bust and band is about 7.5 cm. In centimetres the full sizes are: 32C bust 89 cm, 34C bust 94 cm, 36C bust 99 cm, 38C bust 104 cm.

What is the difference between B cup and C cup?

One inch. A B cup is a bust 2 inches larger than the band; a C cup is 3 inches larger. On a 34 band that is a bust of 36 inches (34B) versus 37 inches (34C).

Which C cup size is most common in India?

34C and 36C, followed by 32C.

Is a C cup the same on every band?

No. Cup volume increases with the band, so 36C holds more than 34C, which holds more than 32C. The size with the same cup volume as 34C is 32D on a tighter band and 36B on a looser band.

Which bra is best for a C cup?

A full-coverage or 3/4th-coverage bra with wider straps; wired for lift, non-wired for comfort on long days. See all bras on Lovable India from ₹179 and filter to your C cup size.

More bra size guides

Bra Size Chart | Bra Size Calculator | What A, B, C, D Cup Sizes Mean

By band: 30 Bra Size | 32 Bra Size | 34 Bra Size | 36 Bra Size | 38 Bra Size

By size: 30B | 32B | 32C | 32D | 34B | 34C | 34D | 36B | 36C | 36D | 38B | 38C | 38D

By cup: A Cup | B Cup | D Cup

Shop bras by size