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Complete the Set & Save 15%

Swim through your period worry-free. No leaks. No sitting out.
Buy a bottom & get 15% off the matching top — automatically applied at checkout.

Complete the Set & Save 15%

Swim through your period worry-free. No leaks. No sitting out.
Buy a bottom & get 15% off the matching top — automatically applied at checkout.

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Leakproof Cotton Underwear Bikini

Moderate Absorbency

$23 ^CAD Buy More Save More

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+5
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Light Leakproof No-Show Underwear Boyshort

Light Absorbency

$22 ^CAD Buy More Save More

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+1

Leakproof UltraThin No-Show Thong

Light Absorbency

$25 ^CAD Buy More Save More

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+6
+2

Light Leakproof No-Show Underwear Bikini

Light Absorbency

$22 ^CAD Buy More Save More

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+2

Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

$29 ^CAD Buy More Save More

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

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10k+ 5-star reviews

Find What Works for Her.

Any cut. Any color. Any Absorbency.
Try multiple styles to match her period
Save 20% when you buy 3+.

Find What Works for Her.

Any cut. Any color. Any Absorbency.
Try multiple styles to match her period and save 20% when you buy 3+.

Swim Sets

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Triangle Bikini Top

$55 ^CAD New Colors

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+7
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Period Swim Full-Coverage Bikini Bottom

Moderate Absorbency

$55 ^CAD New Colors

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+8
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Period Swim Bikini Bottom

Moderate Absorbency

$55 ^CAD New Colors

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+5
+1

Double Scoop Bikini Top

$55 ^CAD New Colors

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+7
+3

Period Swim Full-Coverage Bikini Bottom

Moderate Absorbency

$55 ^CAD New Colors

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Scoop Tankini Top

$60 ^CAD New Style

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Sleep through your period with confidence

Worry less about stained sheets. Save on Overnight Protection. Buy 2+ Overnight styles, get 15% off. Discount applied at checkout.

Sleep through your period with confidence

Worry less about stained sheets. Save on Overnight Protection. Buy 2+ Overnight styles, get 15% off. Discount applied at checkout.

Top-Rated by Customers

+1

Super Leakproof® Sleepover Boxer

Heavy Absorbency

$45 ^CAD Buy 2+ get 15% off

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Period Swim Sport One-Piece

Moderate Absorbency

$99 ^CAD New Colors

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Super Leakproof® Sleepover Short

Heavy Absorbency

$45 ^CAD Buy 2+ get 15% off

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Period Swim Full-Coverage Bikini Bottom

Moderate Absorbency

$55 ^CAD New Colors

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Leakproof UltraThin No-Show Underwear Boyshort 3-Pack

Moderate Absorbency

$65 ^CAD $75 Gift-boxed & ready to give

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Period Swim Bikini Bottom

Moderate Absorbency

$55 ^CAD New Colors

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Light Leakproof No-Show Underwear Bikini 3-Pack

Light Absorbency

$60 ^CAD $66 Easy Choice

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+2

Super Leakproof® No-Show Underwear Bikini

Heavy Absorbency

$29 ^CAD Buy More Save More

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Free Period Guide

Everything your teen ever wanted to know about puberty, menstruation, and more.

Download the Guide

“With this new line, teens can lean into that life well lived from their very first period”

"KT by Knix is aimed at both helping teen girls deal with the reality of periods"

“KT by Knix products are simple and easy to use — you can wear them under absolutely anything”

Teen Underwear Size Chart

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

For adult sizes and styles, check out Knix .

KT Size	Hips	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. 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.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Swimwear Size Chart

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

For adult sizes and styles, check out Knix .

KT Size	Band	Hips	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.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Activewear Size Chart

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

For adult sizes and styles, check out Knix .

KT Size	Hips	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. 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.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Leotard Size Chart

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

For adult sizes and styles, check out Knix.

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

KT Leotards are designed to sit on the hips, so measure around the widest part of the hips and refer to the chart above to find the best fit.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Teen Sweatshirt Size Chart

Size	Bust	Hips
XS	27”	25" - 27"
S	30”	28" - 30"
M	34"	31" - 35"
L	37”	36" - 40"
XL	40”	41" - 44"
XXL	40”	45" - 48"

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Freestyle Leakproof Tights Size Chart

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

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Thigh Savers Size Chart

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

For adult sizes and styles, check out Knix .

KT Size	Hips	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. 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.

Still Not Sure What Size To Get?

Book a Virtual Fitting with a team member and get 1:1 help over video chat.

Bras Size Chart

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

For adult sizes and styles, check out Knix .

Size	Under Bust (in)	Fits Cups
S	26 3/4” - 28 1/4”	A-DD
M	28 1/4” - 29 3/4”	A-DD
L	29 3/4” - 31 1/2”	A-DD