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Product Collections

Active products
Active & Swim products
Active Back to Routine products
Active Base Layers products
Active End of Year Sale Picks products
Active High Impact Sports Bras product
Active Kits products
Active Low - Medium Impact Sports Bras products
Active New Arrivals products
Active Set - POS - AIDO collection products

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Need Help? Book a Virtual Fitting

	Band (in)	Fits Cups	Waist (in)
S	32"	A-DD	27"
S+	32"	E-G	27"
M	34"	A-DD	30"
M+	34"	E-G	30"
L	36"	A-DD	33"
L+	36"	E-G	33"
XL	38"	A-DD	38"
XL+	38"	E-G	38"
XXL	40"	A-DD	43"
XXL+	40"	E-G	43"
XXXL	42"	A-DD	48"
XXXL+	42"	E-G	48"

*Cup ranges from A-G

Need Help? Book a Virtual Fitting

	Waist (in)	Hip (in)	Pants
S	27"	34"-37"	4-6
S+	27"	34"-37"	4-6
M	30"	38"-41"	8-10
M+	30"	38"-41"	8-10
L	33"	42"-44"	12-14
L+	33"	42"-44"	12-14
XL	38"	45"-47"	16-18
XL+	38"	45"-47"	16-18
XXL	43"	48"-50"	18-20
XXL+	43"	48"-50"	18-20
XXXL	48"	51"-53"	22-24
XXXL+	48"	51"-53"	22-24

Need Help? Book a Virtual Fitting

	Bust (in)	Waist (in)
XS	32"	24"
S	34"	27"
M	37"	30"
L	40"	33"
XL	43"	38"
XXL	47"	43"
XXXL	51"	48"
XXXXL	55"	52"

Need Help? Book a Virtual Fitting

	Waist (in)	Hip (in)	Pants
XS	24"	33"	0-2
S	27"	37"	4-6
M	30"	40"	8-10
L	33"	43"	12-14
XL	38"	46"	16-18
XXL	43"	50"	18-20
XXXL	48"	53"	22-24
XXXXL	52"	55"	26

Need Help? Book a Virtual Fitting

	Bust (in)	Waist (in)	Hip (in)
XS	32"	24"	33"
S	34"	27"	37"
M	37"	30"	40"
L	40"	33"	43"
XL	43"	38"	46"
XXL	47"	43"	50"
XXXL	51"	48"	53"
XXXXL	55"	52"	55"

Need Help? Book a Virtual Fitting

	Bust (in)	Waist (in)	Hip (in)
XS/S/M	32"-37"	24"-30"	33"-40"
L/XL/XXL	40"-47"	33"-43"	43"-50"
XXXL/XXXXL	51"-55"	48"-52"	53"-55"

Need Help? Book a Virtual Fitting

	Hip (in)	Pant
XS	30"-33"	00-0
S	34"-37"	2-4
M	38"-41"	6-8
L	42"-44"	10-12
XL	45"-47"	14-16
XXL	48"-50"	18-20
XXXL	51"-53"	22-24
XXXXL	54"-56"	26

Need Help? Book a Virtual Fitting

	Hip (in)	Pants
S/M	33-41"	2-10
L/XL	42-47"	12-18
XXL/XXXL	51-53"	24-26

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	Band (in)	Fits Cups
S	32"	A-DD
S+	32"	E-G
M	34"	A-DD
M+	34"	E-G
L	36"	A-DD
L+	36"	E-G
XL	38"	A-DD
XL+	38"	E-G
XXL	40"	A-DD
XXL+	40"	E-G
XXXL	42"	A-DD
XXXL+	42"	E-G

*Cup ranges from A-G

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	Waist (in)	Hip (in)	Pants
S	27"	33"-37"	2-6
S+	27"	33"-37"	2-6
M	30"	38"-41"	8-10
M+	30"	38"-41"	8-10
L	33"	42"-44"	12-14
L+	33"	42"-44"	12-14
XL	38"	45"-47"	16-18
XL+	38"	45"-47"	16-18
XXL	43"	48"-50"	20-22
XXL+	43"	48"-50"	20-22
XXXL	48"	51"-53"	24-26
XXXL+	48"	51"-53"	24-26

*If you're larger on the bottom, we recommend you size up

Need Help? Book a Virtual Fitting

	Band (in)	Fits Cups
S	32"	A-DD
S+	32"	E-G
M	34"	A-DD
M+	34"	E-G
L	36"	A-DD
L+	36"	E-G
XL	38"	A-DD
XL+	38"	E-G
XXL	40"	A-DD
XXL+	40"	E-G
XXXL	42"	A-DD
XXXL+	42"	E-G

*Cup ranges from A-G

Need Help? Book a Virtual Fitting

	Waist (in)	Hip (in)	Pants
S	27"	33"-37"	2-6
S+	27"	33"-37"	2-6
M	30"	38"-41"	8-10
M+	30"	38"-41"	8-10
L	33"	42"-44"	12-14
L+	33"	42"-44"	12-14
XL	38"	45"-47"	16-18
XL+	38"	45"-47"	16-18
XXL	43"	48"-50"	20-22
XXL+	43"	48"-50"	20-22
XXXL	48"	51"-53"	24-26
XXXL+	48"	51"-53"	24-26

*If you're larger on the bottom, we recommend you size up

Use these band and hip measurements to determine your correct size

Every size in our bodysuit will fit from an A cup to a G cup (yep, it's true!). If you're larger on the bottom, we recommend you size up.

Need Help? Book a Virtual Fitting

Step 1: Measure your Band

Wearing an unpadded bra, wrap a measuring tape around the top of your ribcage.

You’re looking for a snug fit - so we recommend tightening on the exhale and noting the smallest measurement in inches.

Step 2: Measure your Cup

To find your Cup measurement, wrap the measuring tape around the fullest part of your chest, making sure the measuring tape is parallel to the floor. Relax your shoulders and measure on the inch.

If your band measures more than 33, when measuring the cup, pull it a little bit snug before measuring.

Your Results!

Still have questions? Book a Virtual Fitting with our amazing customer experience team!

SHOP

We're still working on your size!

Still have questions? Book a Virtual Fitting with our amazing customer experience team!

Need Help? Book a Virtual Fitting

	Waist (in)	Hip (in)	Pant Size
XS	24"	30"-33"	0-2
S	27"	33"-37"	2-6
M	30"	38"-41"	8-10
L	33"	42"-44"	12-14
XL	38"	45"-47"	16-18
XXL	43"	48"-50"	20-22
XXXL	48"	51"-53"	24-26
XXXXL	52"	54"-56"	26

Need Help? Book a Virtual Fitting

	30	32	34	36	38	40	42	44
A	XS	S	M	L	XL	XXL	XXXL	XXXXL
B	XS	S	M	L	XL	XXL	XXXL	XXXXL
C	XS	S	M	L	XL	XXL	XXXL	XXXXL
D	XS	S	M	L	XL	XXL	XXXL	XXXXL
DD	XS	S	M	L	XL	XXL	XXXL	XXXXL
E	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+
F	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+
G	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+

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	Hip (in)	Pant Size
XS	30"-33"	0-2
XS+	30"-33"	0-2
S	33"-37"	2-6
S+	33"-37"	2-6
M	38"-41"	8-10
M+	38"-41"	8-10
L	42"-44"	12-14
L+	42"-44"	12-14
XL	45"-47"	16-18
XL+	45"-47"	16-18
XXL	48"-50"	20-22
XXL+	48"-50"	20-22
XXXL	51"-53"	24-26
XXXL+	51"-53"	24-26
XXXXL	54"-56"	26
XXXXL+	54"-56"	26

Need Help? Book a Virtual Fitting

	30	32	34	36	38	40	42	44
A	XS	S	M	L	XL	XXL	XXXL	XXXXL
B	XS	S	M	L	XL	XXL	XXXL	XXXXL
C	XS	S	M	L	XL	XXL	XXXL	XXXXL
D	XS	S	M	L	XL	XXL	XXXL	XXXXL
DD	XS	S	M	L	XL	XXL	XXXL	XXXXL
E	XS	S	M	L	XL	XXL	XXXL	XXXXL
F	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+
G	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+

Need Help? Book a Virtual Fitting

	Hip (in)	Pant Size
XS	30"-33"	0-2
XS+	30"-33"	0-2
S	33"-37"	2-6
S+	33"-37"	2-6
M	38"-41"	8-10
M+	38"-41"	8-10
L	42"-44"	12-14
L+	42"-44"	12-14
XL	45"-47"	16-18
XL+	45"-47"	16-18
XXL	48"-50"	20-22
XXL+	48"-50"	20-22
XXXL	51"-53"	24-26
XXXL+	51"-53"	24-26
XXXXL	54"-56"	26
XXXXL+	54"-56"	26

Need Help? Book a Virtual Fitting

	30	32	34	36	38	40	42	44
A	XS	S	M	L	XL	XXL	XXXL	XXXXL
B	XS	S	M	L	XL	XXL	XXXL	XXXXL
C	XS	S	M	L	XL	XXL	XXXL	XXXXL
D	XS	S	M	L	XL	XXL	XXXL	XXXXL
DD	XS	S	M	L	XL	XXL	XXXL	XXXXL
E	XS	S	M	L	XL	XXL	XXXL	XXXXL

Need Help? Book a Virtual Fitting

	Hip (in)	Pant Size
XS	30"-33"	0-2
XS+	30"-33"	0-2
S	33"-37"	2-6
S+	33"-37"	2-6
M	38"-41"	8-10
M+	38"-41"	8-10
L	42"-44"	12-14
L+	42"-44"	12-14
XL	45"-47"	16-18
XL+	45"-47"	16-18
XXL	48"-50"	20-22
XXL+	48"-50"	20-22
XXXL	51"-53"	24-26
XXXL+	51"-53"	24-26
XXXXL	54"-56"	26
XXXXL+	54"-56"	26

Need Help? Book a Virtual Fitting

	28	30	32	34	36	38	40	42	44
A		XS	S	M	L	XL	XXL	XXXL	XXXXL
B		XS	S	M	L	XL	XXL	XXXL	XXXXL
C		XS	S	M	L	XL	XXL	XXXL	XXXXL
D		XS	S	M	L	XL	XXL	XXXL	XXXXL
DD	XS	S	M	L	XL	XXL	XXXL	XXXXL
E	XS	S	M	L	XL	XXL	XXXL	XXXXL
F		XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+
G	XS+	S+	M+	L+	XL+	XXL+	XXXL+	XXXXL+

Need Help? Book a Virtual Fitting

	Hip (in)	Pant Size
XS	30"-33"	0-2
XS+	30"-33"	0-2
S	33"-37"	2-6
S+	33"-37"	2-6
M	38"-41"	8-10
M+	38"-41"	8-10
L	42"-44"	12-14
L+	42"-44"	12-14
XL	45"-47"	16-18
XL+	45"-47"	16-18
XXL	48"-50"	20-22
XXL+	48"-50"	20-22
XXXL	51"-53"	24-26
XXXL+	51"-53"	24-26
XXXXL	54"-56"	26
XXXXL+	54"-56"	26

	Hip (in)
XS/S	30"-37"
M/L	38"-44"
XL/XXL	45"-50"
XXXL/XXXXL	51"-56"

Socks Sizing

Knix Size	Shoe Size
S/M	6-9
L/XL	10-11.5
OS	6-10

Need Help? Book a Virtual Fitting

Step 1: Measure your Band

Wearing an unpadded bra, wrap a measuring tape around the top of your ribcage.

You’re looking for a snug fit - so we recommend tightening on the exhale and noting the smallest measurement in inches.

Step 2: Measure your Cup

To find your Cup measurement, wrap the measuring tape around the fullest part of your chest, making sure the measuring tape is parallel to the floor. Relax your shoulders and measure on the inch.

If your band measures more than 33, when measuring the cup, pull it a little bit snug before measuring.

Your Results!

Still have questions? Book a Virtual Fitting with our amazing customer experience team!

SHOP

We're still working on your size!

Still have questions? Book a Virtual Fitting with our amazing customer experience team!

	32	34	36	38	40	42	44	46	48
A	S	S	S	M	M	M	L	L	L
B	S	S	M	M	M	L	L	L	XL
C	S	S	M	M	M	L	L	L	XL
D	S	M	M	M	L	L	L	XL	XL
DD	S	M	M	M	L	L	L	XL	XL
E	M	M	M	L	L	L	XL	XL	XL
F	M	M	M	L	L	L	XL	XL	XL
G	M	M	L	L	L	XL	XL	XL	XL

Leakproof Pads Sizing

	Cups
M	A-D
XL	DD-G

Teen Underwear Size Chart

KT Period Underwear is designed for smaller and growing bodies to fit teens and tweens

Need Help? Book a Virtual Fitting

KT Size	Hip	Kids Pant Size	Adult Pant Size
XXS	25" - 27"	7	---
XS	28" - 30"	8 - 10	---
S	31" - 34"	12 - 14	00 - 2
M	35” - 38”	16 - 20	4 - 8
L	39” - 42”	---	10 - 14
XL	43” - 46”	---	16 - 18
XXL	47” - 50”	---	20 - 22

Find the Perfect Fit

1. Hip

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

	Age	Height (in)	Weight (lbs)
2T	1 1/2-2Y	33"-36"	28-32 lbs
3T	2-3Y	36"-39"	32-36 lbs
4T	3-4Y	39"-42"	36-40 lbs
5T	4-5Y	42"-45"	40-46 lbs
6T	5-6Y	45"-48"	46-52 lbs

Need Help? Book a Virtual Fitting

	Band (in)
XS	28"
S	30"
M	32"
L	34"
XL	36"
XXL	38"

Need Help? Book a Virtual Fitting

	Hip (in)	Kid's Pant Size (Ages 7-13)	Teen Pant Size (Ages 14+)
XS	25"-27"	7	---
S	28"-30"	8-10	---
M	31"-35"	12-14	00-2
L	36"-40"	16-20	4-10
XL	41"-44"	---	12-16
XXL	45"-48"	---	18-20

KT swimsuits are designed for smaller and growing bodies to fit teens and tweens.

Need Help? Book a Virtual Fitting

KT SIZE	Band (in)	Hips (in)	Kids Pant Size	Adult Pant Size
XXS	23 ³/₄"- 25 ¹/₄"	25" - 27"	7	---
XS	25 ¹/₄" - 26 ³/₄"	28" - 30"	8 - 10	---
S	26 ³/₄" - 28 ¹/₄"	31" - 34"	12 - 14	00 - 2
M	28 ¹/₄" - 29 ³/₄"	35" - 38"	16 - 20	4 - 8
L	29 ³/₄" - 31 ¹/₂"	39" - 42"	---	10 - 14
XL	31 ¹/₂" - 33 ¹/₂"	43"-46"	---	16 - 18
XXL	33 ¹/₂" - 35 ¹/₂"	47" - 50"	---	20 - 22

Find the Perfect Fit

1. Band

First, measure around the torso right below the breast

2. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Need Help? Book a Virtual Fitting

	Bust (in)	Waist (in)
XS	32"	24"
S	34"	27"
M	37"	30"
L	40"	33"
XL	43"	38"
XXL	47"	43"
XXXL	51"	48"
XXXXL	55"	52"

Need Help? Book a Virtual Fitting

KT Size	Band	Hips
XS	28"	25"-27"
S	30"	28"-30"
M	32"	31"-35"
L	34"	36"-40"
XL	36"	41"-44"
XXL	38"	45"-48"

Find the Perfect Fit

1. Band

First, measure around the torso right below the breast

2. Hips

Stand with your feet together and measure around the widest part of your hips and bottom. Keep the measuring tape parallel to the floor.

Need Help? Book a Virtual Fitting

Size	Hips	Height	Weight
XS/S	25"-30"	4'2" - 5'1"	65 - 100 lbs
M/L	31"-40"	4'9" - 5'6"	105-130 lbs
XL/XXL	41"-48"	4'11" - 5'6"	135 - 170 lbs

	32	34	36	38	40	42	44	46	48
A	S	S	S	M	M	M	L	L	L
B	S	S	M	M	M	L	L	L	XL
C	S	S	M	M	M	L	L	L	XL
D	S	M	M	M	L	L	L	XL	XL
DD	S	M	M	M	L	L	L	XL	XL
E	M	M	M	L	L	L	XL	XL	XL
F	M	M	M	L	L	L	XL	XL	XL
G	M	M	L	L	L	XL	XL	XL	XL

	32	34	36	38	40	42	44	46	48
A	S	S	S	M	M	M	L	L	L
B	S	S	M	M	M	L	L	L	XL
C	S	S	M	M	M	L	L	L	XL
D	S	M	M	M	L	L	L	XL	XL
DD	S	M	M	M	L	L	L	XL	XL
E	M	M	M	L	L	L	XL	XL	XL
F	M	M	M	L	L	L	XL	XL	XL
G	M	M	L	L	L	XL	XL	XL	XL

	32	34	36	38	40	42	44	46	48
A	S	S	S	M	M	M	L	L	L
B	S	S	M	M	M	L	L	L	XL
C	S	S	M	M	M	L	L	L	XL
D	S	M	M	M	L	L	L	XL	XL
DD	S	M	M	M	L	L	L	XL	XL
E	M	M	M	L	L	L	XL	XL	XL
F	M	M	M	L	L	L	XL	XL	XL
G	M	M	L	L	L	XL	XL	XL	XL