How to make your daughter's first period EASY and FUN!CLICK HERE TO READ.
Welcome to Knicked, Welcome to Puberty and Periods SHOP HERE
Terms & Policies
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.
*NO EXCHANGES and NO REFUNDS on these clearance products, so please choose carefully! *discontinued style or the last one in a size.
Knicked Racerback Period Swimsuit
Discontinued Style - Limited Sizing Available
Looking for a great deal? Need period swimwear? Want one-piece coverage? Limited sizes available?
We've got you covered.
Our Knicked Period Racerback 1-Piece Swimsuit allows girls to NEVER miss out on the fun when it comes to the water. No standing on the sidelines, we've got you covered! No extra period product is required, our racerback will keep you safe from leaks*
⚠️ CLEARANCE ITEM - ALL SALES ARE FINAL
Please note limited sizing as these are discontinued stock - NO EXCHANGES OR RETURNS WILL BE ACCEPTED
💖 What Makes It Different?
Unlike regular one-piece swimsuits, our Racerback features:
✔ Heavy absorbency period protection
✔ Racerback design
✔ Removable modesty cups
✔ Thin waterproof layer prevents leaks
✔ Quick-drying outer material
✔ No extra period product required*
✔ CLEARANCE PRICING - Save $40!
That means total protection EVERY DAY of your period, in and out of the water — at an amazing clearance price!
🏊♀️ Perfect For:
• Swim squad & swimming carnivals
• School camps
• Beach & pool days
• Creek & river swimming
• One-piece coverage
• Budget-friendly period protection
🌿 Designed for Active Swimmers
Created by a mum, designed for real periods.
Our Racerback Swimsuit uses:
• Same technology as our heavy absorbency period underwear
• PLUS a thin waterproof layer
• Removable modesty cups
• Made to keep you protected in and out of water
Because Knicked Swimwear allows girls to NEVER miss out on the fun when it comes to the water.
Knicked period undies have always been and will continue to be FREE FROM NASTIES such as PUL'S (plastics) or PFAS (chemicals).

* Please see our swim FAQs for more information.

Our featured teen Model wears a ladies size 10 in clothing and prefers size 14/16 in our swim range - her measurements are: Waist - 78cm & Hips - 100cm. Our other model is wearing a size 12/14 (Ladies 8) her measurements are: Waist - 74cm & Hips 90cm.
Tracked postage is $9.95
Express postage is $14.50
Orders over $99 receive complimentary FREE REGULAR SHIPPING
ALL SALES ARE FINAL - NO EXCHANGES OR RETURNS WILL BE ACCEPTED
Great fit! Good coverage for young swimmers. Great quality and easy to wash and wear.
My daughter loved this swimsuit. She said it was so comfortable and she didn't have to worry at all. Thank you!
The design and cut of the swimsuit is perfect. Very comfortable and fit my daughter well.
Absolutely delighted with the products we’ve bought. We have tried the boyleg shorts, knickers and two different styles of togs. Our teens are so impressed and so am I, with fit and quality and the service is exceptional! Thank you we will be back :)
The quality of the swimwear is amazing, offering confidence as well as being comfortable. We live at the beach, so are always in the water. Especially good for children beginning to manage their period. We look forward to purchasing more quality period items as needed.
Ordered the 10-12 size for my daughter, they fit really well, and meant she didn’t miss out on swimming fun while on our beach holiday this week. Such a great buy!
My daughter tried these out last week she is only petite for just turned 12 so size 10 to 12 girls is a good fit on her.Really stylish bathers her swim instructor commented on her new bathers!
Quick postage. Nice swimsuit and fits my daughter well. Have not used in pool yet, but happy with the product so far.
The size is much too big. Not true to size.
Hi Paulina, Can see you have posted this review more than a year after receiving the product - wondering if you actually meant this review for a more recent purchase from elsewhere - as no free exchange for sizing was ever requested.
WORKS GREAT
My daughter has only swam in these a couple of times. That are beautiful swimmers but just a bit on the big side. I can’t wait for her to grown a bit more so she can wear them with confidence.
Got this for my daughter and it fitted and looked amazing! Fast and efficient delivery. Thanks for a great product!
I bought 2 pairs of these for my 2 teens who are vastly different. They both love them. They are comfortable, supportive and absorbent. One of my teens didn't like swimming because she is irregular and didn't like to be caught out. She was the first to ask to go as soon as these arrived. Highly recommend!
My daughter feels well protected and loves these bathers better than her normal ones.
My daughter loves her bathers, she even asked if she could also wear it when not on her period 😀 So comfortable and totally leak proof, even on the heaviest days. She is only 11 and felt so left out when her friends all went in the pool and she couldn’t. Thanks for giving her confidence back. We are very happy with the product, quality is great. I’m so glad i found this swimwear for her. Thank you Knicked!
Simple design and confidence building for a team that has just started and doesn’t want to be embarrassed and continue her passion for swimming
Received really quickly and perfect size. My daughter was very happy.
Teen Period Swimwear - Racerback Style
Just bought our second pair of togs, and they really work! We’ve never had an issue with leaking, even on heavy days. My daughter wears these with board shorts for 2-2.5 hours at a time. They have never let her down..
Thankyou received really fast haven't yet tried as its a xmas present
I am so glad I found this swimwear for my daughter. She wore it for the first time yesterday at a school swim day and it worked great! Her friends said she looked great as well so she had double confidence which is amazing. Was also a nearly perfect fit (slightly bigger than anticipated). Will definately be buying more from this range.
I love the designs and colours, they are great. The best part is they have good coverage. The only problem we have with the black full piece is that when my daughter pushes off the swim the top part folds down a bit. She jus wears a Rashie with it now.
My daughter was pleased to receive this. So comfortable and doesn’t stop her swim training.
Teen Period Swimwear - Racerback Style
Perfect fit and comfortable and reliable.
My daughter has used this and is so far really happy with it. She feels confident and likes that it looks just like her regular speedo.
As a kid who are using this, she loved the non-leak part but quite didn't like the padding for the chest. My daughter indicated that she had to pull the top in as keep sliding down. She was hoping that to have a normal heavy absorbency period swim suit without the padding.
Thank you for your review, we are so glad your daughter has found our racerback to be leak free when swimming, to resolve the issue she is having, please look for the slit located inside the top of the swimsuit and remove the pads from each side.
I love the fit and comfort of this piece, whilst also having confidence to swim!
The one piece racerback was a game changer ahead of school swim gala day. The speedy delivery was a life saver. Excellent quality and this swimming costume meant Miss 12yr had the confidence to participate
These are a blessing so my daughter can still swim and compete in her swimming carnivals, even on her period. No blood leakage or trails of blood while swimming in the water (which was one of her fears). One thing is the lining in the undie part at the opening tends to fold over a little while competitive swimming and then you can see that they aren’t normal swimwear, just a quick smooth out fixes this and then you can’t tell. Normal swimming this does not happen. This has given her a new confidence in the water and comforts her to know she can still do the things she loves.