20% OFF ALL UNDERWEAR

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

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 to assist.

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

As a guide we recommend purchasing the same size underwear your tween/teen now wears, for example: if your tween currently fits a child size 8/10 (in any other brand) select our 8/10 but if they wear a ladies size 10 underwear (of any brand) then select our Teen 14/16 as this will be the equivalent.  We have also provided the flat lay (side seam to side seam on the waistband) to measure against an existing pair of 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). Here is a quick link to our how to organise an exchange:  Exchange Page.

 Knicked Period Proof Undies Sizing Chart - Dance Diva, Modal, Active & Swim Brief

** Please size down in our Sporty Shorts if your tween/teen would prefer a tight bike short fit.

Knicked Period Proof Racerback Sizing Chart - One-piece, swimmers, bathers

Knicked Period Proof Multi-Stretch Seamless Undies Sizing Chart

 Knicked International Sizing Chart for Period Proof Undies & Swimwear

 

Reviews

Customer Reviews

Based on 9 reviews
100%
(9)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
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!

K
Kiara
Waterproof bag is AMAZING

The colourful theme makes the bag look so fun, you wouldn’t even guess it is for period undies. Will be buying another one, because I went on holiday and used it as a little bag to put my phone, portable charger and earphones so they wouldn’t get wet in the rain. Definitely recommend.

S
Sophia B.
Great little travel bag for school

This was the perfect purchase for my daughter to put her period undies discreetly in her school bag.

T
Tiffany
Great little bag and good investment!

These waterproof bags make looking after used undies/swimmers hassle free, keeping them protected in-between hand rinsing and machine washing them. Their fun design keeps them girl-friendly and is a discreet little case in her school/swimming bag too. A big help!

M
Megan O.

I have purchased this for my 11 year old to keep in her school bag should the day arrive. She loves the designs and how it dosen't look like period supplies

Customer Reviews

Based on 9 reviews
100%
(9)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
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!

K
Kiara
Waterproof bag is AMAZING

The colourful theme makes the bag look so fun, you wouldn’t even guess it is for period undies. Will be buying another one, because I went on holiday and used it as a little bag to put my phone, portable charger and earphones so they wouldn’t get wet in the rain. Definitely recommend.

S
Sophia B.
Great little travel bag for school

This was the perfect purchase for my daughter to put her period undies discreetly in her school bag.

T
Tiffany
Great little bag and good investment!

These waterproof bags make looking after used undies/swimmers hassle free, keeping them protected in-between hand rinsing and machine washing them. Their fun design keeps them girl-friendly and is a discreet little case in her school/swimming bag too. A big help!

M
Megan O.

I have purchased this for my 11 year old to keep in her school bag should the day arrive. She loves the designs and how it dosen't look like period supplies

Search