Excellent product, fits true to size.
Bought these for my daughter, she loves them. Keeps her comfortable and prevents any leaks on her heaviest nights.
Great service and great product.
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.
Knicked High-Waisted Period Swim Brief
Heavy Absorbency with LeakSTOP Technology (Sizes 6-20)
Want slimming high-waisted coverage? Need heavy protection? Looking for adult sizes? Want white towel protection?
We've got you covered.
You asked and we listened! Now Mums/Women can also have the protection we've always provided for Tweens/Teens with a larger sizing range and with our LeakStop technology - allowing up to 40mls or 4 super tampons or 8 regular tampons. These slimming high-waisted swim briefs have our NEW LeakSTOP Technology which we created to STOP leaking over the gusset when out of the water soaking up some rays. White towel protection!
💖 What Makes Them Different?
Unlike regular swim briefs, our High-Waisted Period Swim Brief features:
✔ NEW LeakSTOP Technology (stops leaks around leg holes)
✔ Heavy absorbency (up to 40mls)
✔ Slimming high-waisted design
✔ Anti-pilling material
✔ Chlorine resistant & SPF50+
✔ Sizes 6-20 (Adult & Teen)
✔ Quick-drying outer material
✔ No extra period product required*
That means total protection EVERY DAY of your period, in and out of the water - even when lounging on white towels!
🏊♀️ Perfect For:
• Beach & pool days
• Heavy flow protection
• High-waisted coverage
• Adult & teen sizes (6-20)
• Slimming silhouette
• All-day water activities
• Confident swimming on your period
🌿 Designed for Women & Teens
Created by a mum, designed for real periods.
Our High-Waisted Period Swim Brief uses:
• Same technology as our heavy absorbency period underwear
• PLUS a waterproof layer
• PLUS NEW LeakSTOP technology around leg holes
• High-quality anti-pilling material
• Made to keep you protected in and out of water
Because Knicked Swim allows women and 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).
IMPORTANT! On sizes 6/8 and 10/12 the tag sewn inside the swim brief is INCORRECT! Please ignore! If you order a 6/8 or 10/12, you will receive the correct sizing as shown by the sticker on the outside of the pouch they arrive in and will match the sizing provided on our sizing chart. We apologise for any confusion

* Please see our swim FAQs for more information.

Our Adult Model is wearing size 18-20 (AUS) in our high-waisted swim brief - her measurements are Waist: 102cm Hips: 125cm. Our Teen Model is wearing an Adult size 10-12 (AUS) - her measurements are: Waist - 76cm & Hips - 96cm. Please use the flatlay to measure against an existing pair of swim briefs to ensure you select the correct size.
Tracked postage is $9.95
Express postage is $14.50
Orders over $99 receive complimentary FREE REGULAR SHIPPING
Knicked will exchange item(s) that have not been washed, worn and are in AS NEW condition, we request you submit our Exchange Form within 14 days of receiving your product. Knicked will cover one new shipping cost as a gift to assist - please note: if purchased on sale or outside Australia item(s) can ONLY be returned for a gift voucher to repurchase a new size or style within 5yrs.
Excellent product, fits true to size.
Bought these for my daughter, she loves them. Keeps her comfortable and prevents any leaks on her heaviest nights.
Great service and great product.