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.
Rainbow Period Swim Set - 2 Pieces
Detailed Back with Heavy Absorbency
We all love a rainbow! Love standing out? Looking for a complete set? Need heavy protection?
Then this set is for you.
Shine with this gorgeous rainbow designed two-piece set featuring our award-winning period swim briefs matched with a rainbow inspired bikini top. Say goodbye to boring swimwear and hello to comfort, protection and style!
💖 What Makes It Different?
Unlike regular swim sets, our Rainbow Set features:
✔ Rainbow detailing front & back
✔ Multi-strap bikini top
✔ Choice of bottoms (Original OR High-Waisted)
✔ Heavy absorbency period protection
✔ Removable modesty cups
✔ Removable side ties on Original brief
✔ High-Waisted option has StopLeak
✔ Award-winning period swim technology
That means stunning rainbow style PLUS your choice of period-proof bottoms - comfort, protection and style!
🏊♀️ Perfect For:
• Beach & pool days
• Heavy flow protection
• Rainbow lovers
• Detailed back design
• Multi-strap style
• Customisable bottom choice
• Standing out with style
🌸 What's in the Set:
• Your choice of either our heavy absorbency swim briefs in Original with removable side ties OR High-waisted swim brief with StopLeak technology
• Black with rainbow detailing on the front and back with multi-strap bikini top with removable modesty cups
Please note: Knicked only manufactures the period swim bottoms, we purchase the additional pieces separately to offer a complete outfit
🌿 Designed for Style & Protection
Created by a mum, designed for real periods.
Our Rainbow Set uses:
• Same technology as our heavy absorbency period underwear
• PLUS a thin waterproof layer
• Choice of Original OR High-Waisted bottoms
• Multi-strap detailed design
• 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).
Our teen model on the left is wearing the High-Waisted brief set in a size Teen 14/16 (Adult 10) and our teen model on the right is wearing our Original Swim Brief (with removable side ties) in a size Teen 12/14 (Adult size 8)

* Please see our swim FAQs for more information.


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.