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 Active Stretch™ Pre-Period Underwear
Light Protection for Puberty & First Periods
Puberty started? Discharge? Spotting? Preparing for a first period?
We've got you covered.
Our Knicked Active Stretch™ Pre-Period underwear is made from breathable silky micro-mesh with light absorbency, perfect for girls who have just started puberty. Whether it's discharge, mucus, spotting, light bladder leaks, or their period arriving sooner than expected — these offer all-day leak-proof protection so they can stay fresh and confident.
💖 What Makes Them Different?
Unlike panty liners, our Active Stretch Pre-Period features:
✔ Light absorbency (5mls) — equivalent to 1 panty liner
✔ All-day leak-proof protection
✔ Breathable silky micro-mesh material
✔ White waistband (our signature for light absorbency)
✔ Feels just like ordinary knickers
✔ Cooling, lightweight design
✔ Perfect for introducing the idea of periods
That means protection from discharge, spotting, light flow, or even light bladder leaks — without the waste or discomfort of panty liners.
🩰 Perfect For:
• Girls who have just started puberty
• Discharge & mucus protection
• Spotting & light flow
• Preparing for a first period
• Light days either side of a period
• Light bladder leaks (LBL)
• School days & everyday wear
🌿 Designed for Growing Girls
Created by a mum, designed for real puberty.
Our Active Stretch Pre-Period is:
• Light absorbency (5mls capacity)
• Reusable & sustainable
• Breathable & cooling
• Feels like regular underwear
• Made to keep them fresh and confident
Because puberty is confusing enough — protection shouldn't be.
Knicked period undies have always been and will continue to be FREE FROM NASTIES such as PUL'S (plastics) or PFAS (chemicals).
Tip: Always ensure they have 1 pair for each day of the week (especially at school), to help them stay fresh.


As a guide: Our teen model wears a size 12-14 in this style and is a ladies size 8 (waist: 67cm hips: 89cm)
To measure against another brand of underwear please use the flatlay measurements - side seam to side seam along the waistband.
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.
My daughter wears these and nothing else. The quality is great, and they last a long time.
We ordered the modal hipster originally and my daughter wasn't happy with the fit. Knicked made it super easy to exchange and we got the active stretch in the same size. She hasn't started her period yet but we're feeling more confident and prepared!
Great knickers made from the quality matetial, look great, feel nice.
Little sister says they fit her perfectly and she hasnt had any leaks!
Great undies. I wish they would cover more bottom, they fit perfectly except for the bum coverage. Daughter finds they ride up.
My daughter recently had her 1st period. We’ve had these undies on standby for 2 years! She loved them. Especially these active stretch ones. She’s a gymnast and felt confident wearing these at gym.
Very happy with purchase, my daughter loves wearing them.
Great knickers, simply the best
I wish these were around when I was just starting my period! They are great quality, convenient and my daughter says they are very comfy. She uses these on school days because they last the entire day without needing to change. When she gets home she has a shower and rinses them out, then I pop them in a wash bag and into the machine. So easy, great for the environment and at an affordable price. Definitely a winner!
My 12 year old has gained great confidence with these nickers she is also a lot more confident with these at school sports days . Thank you so much
My daughter really likes the feel of these undies and she mentioned that were comfy to wear as well. I was very happy with the time from order to receiving the undies. Thank you Knicked.
Daughter loves them, so much more discreet!
My daughter loves them and won’t wear any others. She feels 100% safe going through the days knowing she won’t leak! Eeek! You e a true saviour - thank you KNICKED 🙏
My 10yr old is very happy with undies & said they are super comfortable & fit great. Thank you xxx
My 10yr old is very happy with these and thinks they are super comfy! Lovely material. 🙂
My daughter loved the feel of the material and the fit.
Being prepared is the best thing. Ordered the next size up just in case. Glad I had a few pairs as an expected situation occurred and I was at the ready. My daughter is super happy with these pants. Work fantastically, thank you!
I purchased for someone who is pre period and nervous about her period arriving when she is out and causing embarrassment. These knickers have supplied much needed confidence and we will be purchasing more!
I bought these knickers for my daughter who has not yet started her periods. She loves the feel of them & is confident for when her time comes that this is the product she loves to wear. I purchased the overnight knickers for myself and we talked about the different absorbance between the two.
My daughter loves Knicked period underwear. She was feeling quite anxious as a tween that her periods would start at school or when she was performing. She’d heard a lot of things from her friends about terrible first period experiences that contributed to her anxiety. So, we thought we’d try Knicked to give her peace of mind and ease her stress and it’s been brilliant. They’re comfy and easy to wear and she feels more confident now. Highly recommend this product
My daughter absolutely loves these undies. She's onto her 2nd batch and prefers to wear them all the time over her other ones.
Just saw a comment about boyleg ones. I reckon she'll want a set of those as well!
I ordered these for my daughter in preparation. She found them comfortable, and fitted well.
Great buy fantastic for my daughter
Bought these after a friend highly recommended them and just so glad I did. My tween loves them as they are so comfy and stylish and then “IT” happened (quite unexpectedly) but these protected her from any embarrassment brilliantly. Thank you so much Caro your product has been a godsend, we now also have the heavy bundle which are making every month so easy to manage.
Bought a couple of pairs in preparation for my 12 year old. She said they are the most comfortable undies. She loves them! Will definitely purchase a pack after reading the all positive reviews about how absorbent they are.
My daughter & I were excited to receive the package from 'Knicked' in the mail. It arrived very quickly & we loved the complementary gift...a very thoughtful gesture. My daughter said that knowing she now has her special period undies, she is less nervous about having her period when she is at school. Thank you from the bottom of my heart.
My 11 year old daughter is in the middle of her second period and so far the pants have been great ... she’s quite heavy already but there’s been no leakage even in the overnight pair. She says they’re comfy and I find them easy to clean. The costumer service I received was really fantastic too. Thank you 🙏😊
My daughter says these are super comfy! I cannot fault the product and the customer service, amazing! I highly recommend.
We have ordered these in preparation for my 12 year old getting her period, so we cannot comment on how well they work just yet. She says they are comfy and she likes them, however she does find them a little bit skimpy across the bottom and the height at the back. She is only a petite, but tall girl, so we had to order the smallest size as the first ones we ordered were too loose, this may be the reason for this. We would love to see these come in a midi type of fit, especially during the heavy days, as that is when there is the most worry about leakage.
My daughter said they were comfy, felt like wearing bikini bottoms. She tried them at home, overnight, towards end of cycle. Her preference is boxer style underwear, usually.
Thank you for your suggestion, we are currently designing a boyleg style which will be in store soon..