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Did you know that every body has more than just one bra size? We all know the struggle of finding a new bra that doesn’t fit quite right, even when the measurements seem correct. That’s where sister sizes come in! These alternative sizes are like the close relatives of your usual bra size and can provide a comfortable and secure fit. To find your sister size, simply go down one band size and up one cup size—or vice versa.

The following Sister Size Chart is here to help you determine your perfect sister size(s).

Good to know: Sister sizes are also a great option if your favorite item is sold out in your usual size!

Measurement Chart
Sister Sizes

underbust measurement (cm)	chest measurement (cm)	underbust measurement (inch)	chest measurement (inch)
68-72	82-84	26.8-28.3	32.3-33.1
	84-86		33.1-33.9
	86-88		33.9-34.6
	88-90		34.6-35.4
	90-92		35.4-36.2
73-77	87-89	28.7-30.3	34.3-35.0
	89-91		35.0-35.8
	91-93		35.8-36.6
	93-95		36.6-37.4
	95-97		37.4-38.2
	97-99		38.2-39.0
	99-101		39.0-39.8
78-82	92-94	30.7-32.3	36.2-37.0
	94-96		37.0-37.8
	96-98		37.8-38.6
	98-100		38.6-39.4
	100-102		39.4-40.2
	102-104		40.2-40.9
	104-106		40.9-41.7
83-87	97-99	32.7-34.3	38.2-39.0
	99-101		39.0-39.8
	101-103		39.8-40.6
	103-105		40.6-41.3
	105-107		41.3-42.1
	107-109		42.1-42.9
	109-111		42.9-43.7
88-92	102-104	34.6-36.2	40.2-40.9
	104-106		40.9-41.7
	106-108		41.7-42.5
	108-110		42.5-43.3
	110-112		43.3-44.1
	112-114		44.1-44.9
	114-116		44.9-45.7
93-97	107-109	36.6-38.2	42.1-42.9
	109-111		42.9-43.7
	111-113		43.7-44.5
	113-115		44.5-45.3
	115-117		45.3-46.1
	117-119		46.1-46.9
	119-121		46.9-47.6

your standard bra size	try...	or...
70 a
70 b	75 a
70 c	75 b
70 d	75 c
70 e	75 d
75 a		70 b
75 b	80 a	70 c
75 c	80 b	70 d
75 d	80 c	70 e
75 e	80 d
75 f	80 e
75 g	80 f
80 a		75 b
80 b	85 a	75 c
80 c	85 b	75 d
80 d	85 c	75 e
80 e	85 d	75 f
80 f	85 e	75 g
80 g	85 f
85 a		80 b
85 b	90 a	80 c
85 c	90 b	80 d
85 d	90 c	80 e
85 e	90 d	80 f
85 f	90 e	80 g
85 g	90 f
90 a		85 b
90 b	95 a	85 c
90 c	95 b	85 d
90 d	95 c	85 e
90 e	95 d	85 f
90 f	95 e	85 g
90 g	95 f
95 a		90 b
95 b		90 c
95 c		90 d
95 d		90 e
95 e		90 f
95 f		90 g
95 g
Helpful if...	...cups fit well but band is too tight, or band fits well but cups are too big	...cups fit well but band is too loose, or band fits well but cups are too small

Paula Wireless Bra