Why it's important you only wear BREATHABLE period underwear.

How Does Knicked Swim Work?

Period Undies & Swim Wet Bag

Size chart
Knicked Tween & Teen Period Underwear Size Guide

Please see each product page, for individual sizing.

As a general rule, please choose the same size for our period undies and period swimwear as your child's regular underwear size.

Our period underwear is designed here using Australian Child/Youth underwear guidelines. It's important to note that child sizing, also crosses over into women's sizing at our 12/14, so we have also shown this on our sizing charts (on each individual product page) to assist.

We also understand purchasing online can make judging sizing difficult and everyone has a different body shape (literally hundreds of waist & hip combinations) so we have created guides on each product page to help you choose the best fit for each product, or feel free to email our helpful team at theteam@knicked.com.au with waist & hip measurements so we can assist further.

To measure against existing underwear: use the flat lay measurement (side seam to side seam on the waistband) to compare with their current underwear.

Don't panic if you do find you've ordered the wrong size, KNICKED will happily exchange sizing and also cover the postal costs to reship (once per order) as long as underwear has been tried on over clean underwear and returned in AS NEW condition (not washed/worn free of lint/hair/marks), and packaging in original condition.

Please click here for our Exchange/Refund Forms & Guidelines to organise an exchange. 

Reviews

Customer Reviews

Based on 13 reviews
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(13)
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M
M.C.

Perfect for my pre teen daughter

C
C.S.
This is the best wet bag for teens and a fun design!

This is the best wet bag so far perfect for the school bag and a funky design! Thank you for creating amazing products

J
John B.

Just love this little wet bag is now in permanent place in my bag for those unexpected times

L
Laura P.
Cute design perfect for a tween

My tween loves her waterproof bag (“period undies wet bag”). For now it’s an emergency kit with all the supplies she needs. Fits a surprising amount and it’s high quality with a great design! Highly recommend!

R
RACHAEL O.

Great to chuck in my daughter's school bag with all the necessary items.

Customer Reviews

Based on 13 reviews
100%
(13)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
M
M.C.

Perfect for my pre teen daughter

C
C.S.
This is the best wet bag for teens and a fun design!

This is the best wet bag so far perfect for the school bag and a funky design! Thank you for creating amazing products

J
John B.

Just love this little wet bag is now in permanent place in my bag for those unexpected times

L
Laura P.
Cute design perfect for a tween

My tween loves her waterproof bag (“period undies wet bag”). For now it’s an emergency kit with all the supplies she needs. Fits a surprising amount and it’s high quality with a great design! Highly recommend!

R
RACHAEL O.

Great to chuck in my daughter's school bag with all the necessary items.

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