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.
Reversible Floral Period Swim Bikini Set
Self-Tie with StopLeak Technology
Want two looks in one? Need adjustable fit? Looking for floral style? Want heavy absorbency in water?
We've got you covered.
Our Knicked Period Swim Tie Bikini Set features ties on each side that ensure the perfect fit for everybody and a gorgeous Flower Reversible Bikini Top. Get two looks in one with the reversible top (plain black on the reverse side), and we've updated our ever-popular self-tie bikini to now have StopLeak — so they're even better than EVER.
💖 What Makes It Different?
Unlike regular bikini sets, our Reversible Floral Bikini features:
✔ Reversible bikini top (floral & plain black)
✔ Self-tie bikini brief with StopLeak
✔ Heavy absorbency period protection
✔ Adjustable ties for perfect fit
✔ Bikini cut with bottom coverage
✔ Thin waterproof layer prevents leaks
✔ Quick-drying outer material
✔ No extra period product required*
✔ Medium to heavy flow protection
That means two looks in one PLUS adjustable, comfortable protection that fits YOUR body perfectly!
🏊♀️ Perfect For:
• Beach & pool days
• Medium to heavy flow
• Adjustable fit for all bodies
• Bikini-style coverage
• Reversible style options
• All-day water activities
• Confident swimming on your period
🌸 What's in the Set:
• 1 x Self-Tie Bikini Brief with StopLeak
• 1 x Reversible Flower Top (plain black on the reverse side)
🌿 Designed for the Perfect Fit
Created by a mum, designed for real bodies.
Our Reversible Floral Bikini uses:
• Same technology as our heavy absorbency period underwear
• PLUS a thin waterproof layer with StopLeak
• Quick-drying outer material
• Adjustable ties for custom fit
• Reversible top for two looks
• Made to keep you protected in and out of water
Because Knicked Swim 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).
Important: Your bikini bottoms must remain tightly tied to ensure no water can enter/exit the absorbency area.

* Please see our swim FAQs for more information.

Our beautiful teen models both wear a ladies' size 6-8 in clothing and are modelling the XS-S in this style
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.