Skip to content

go to Size Chart

Get accurate measurements, we recommend you re-check your size with every purchase..

For most of our styles, the most important measurement is your hip size to get the right fit. It is also useful to check your waist measurement for certain styles. Please take a look at the product description for a guide.

If you're in between sizes, we suggest sizing up (e.g. from a size 10 to 12) for ultimate comfort.

Size chart popup image

1. Place Your Feet Together

Having your feet apart can give a measurement that is actually larger than your hip area.

2. Waist

Your natural waist measurement should be taken at the narrowest part of your torso. This is where your body curves in and is often at or above your belly button.

3. Hip

Your hip measurements should be taken at the fullest part of your hips.

Size chart popup image
swipe

We want you to feel confident ordering Pee Chee Cheex. Below you’ll find how our refunds, exchanges and guarantees work, depending on the reason your item is coming back.

100 Day Risk Free Guarantee (on any multipack)

Our 100 Day Risk Free Guarantee is here to help first-time customers try Pee Chee Cheex with confidence, and experience how our period undies perform, risk free.

This guarantee is about product performance, not fit or sizing. It’s designed so new customers can trial our leak protection with confidence.

How the 100 Day Risk Free Guarantee works

If this is your first order with Pee Chee Cheex, you’re covered under our 100 Day Risk Free Guarantee for one (1) pair only from a multipack.

When your order arrives, we recommend:

  • Washing and wearing just one pair first to trial performance during your period
  • Keeping the remaining pairs unopened, unworn, unwashed, and sealed (each pair is individually packed and sealed for hygiene reasons)

If the worn pair does not perform as intended, you can contact us within 100 days of receiving your order and we’ll help you out.

And just so you know — you don’t need to send back the worn pair.

Let us break it down for you

If you purchase a multipack and want to try Pee Chee Cheex for the first time, simply wear one pair to see how they perform.

If that pair doesn’t work for you, reach out to us within 100 days. Any remaining pairs must be unopened and sealed to be eligible for a refund or store credit.

Wearing more than one pair before contacting us may mean the order isn’t eligible under this guarantee.

A quick heads-up

This guarantee is designed to help first-time customers trial product performance only.  
Size or fit issues, size exchanges, change-of-mind returns, and orders placed by returning customers are handled separately — please see the sections below.

Size Exchanges

We want you to feel confident choosing your size. Our undies are made true to size, so we strongly recommend using our size guide before ordering.

If you need a size exchange, the following conditions apply:

  • Size exchanges must be requested within 30 days of receiving your order  
  • Each order includes one (1) complimentary size exchange
  • Items must be unopened, unwashed, unworn, and unused
  • Each pair must remain sealed in its original packaging for hygiene reasons  
  • Exchanges are available for the same style and colour only, subject to stock availability   

If you request additional size exchanges beyond the first, an exchange fee may apply to cover handling and shipping costs. We’ll always let you know any applicable fee before processing.

Important:  
Size exchanges are not covered under our 100 Day Risk Free Guarantee.

If the requested replacement size is unavailable, we’ll be in touch to discuss available options.

 

Change of Mind

If you change your mind, you can request a return within 30 days of receiving your order, provided the following conditions are met:

  • Proof of purchase is provided
  • Clear photographs (front and back) of the product packaging are supplied to help us assess the return
  • The product is unopened, unwashed, unworn, and unused
  • Each pair remains sealed in its original packaging for hygiene reasons
  • The packaging has not been opened, tampered with, damaged, or altered in any way

We don’t accept change-of-mind returns on Sale, Clearance, Factory Seconds, or Final Sale items, including products in our We Made Heaps category.

For eligible change-of-mind returns, we’ll let you know whether a refund, store credit, or exchange is available, depending on the circumstances. (This does not affect your rights in relation to faulty or incorrectly described products)

 

Faulty Product

We work extremely hard to ensure all Pee Chee Cheex products are made to a high standard. If something isn’t right, please reach out — we’re here to help.

If a product is faulty or not as described, you may be entitled to a remedy under Australian Consumer Law.

Depending on the nature of the issue, we may offer a repair, replacement, refund, or store credit, in line with your rights.

Products marked as factory seconds at the time of purchase are excluded from this section, as any known faults are disclosed upfront.

 

Cost of Returns

Who covers return shipping depends on why the item is coming back — here’s how it works.

  • 100 Day Risk Free Guarantee: If your return is approved under our 100 Day Risk Free Guarantee, we’ll take care of the return shipping. Just reach out to us first so we can help organise it.
  • Faulty or incorrectly described products: If something arrives faulty or not as described, we’ve got you. Return shipping will be covered in line with your rights under Australian Consumer Law.
  • Size exchanges and change-of-mind returns: For size exchanges or change-of-mind returns, return shipping costs are generally covered by the customer, unless we let you know otherwise.

To help make sure your return gets back to us safely, please follow the return instructions we provide. If items are sent back without getting in touch first or without using the suggested return process, we can’t be responsible for parcels that go missing along the way.

 

How To Complete Refunds & Exchanges

To get started, please email us at wecare [@] au.peecheecheex [dot] com before sending anything back. We’ll send you the required form to complete.

Don’t have a printer? No worries, just download the form, type your details into the fields provided, save it, and email it back to us.

Once we receive your email, our team will be in touch to confirm the next steps.

 

How To Pack and Send Returns

We recommend using the reusable satchel or mailer bag your order arrived in — it’s compostable and biodegradable.

Please don’t write on, label, tape, or attach anything directly to the Product(s) packaging.

If you’re arranging your own return postage, we recommend using a tracked service and keeping your tracking number until your return has been processed. This helps ensure your parcel gets back to us safely, as we’re unable to take responsibility for returns that are lost or go missing in transit.

 

How To Pack and Send Returns

Please allow time for your return delivery to reach us. This may very depending on your location. Refunds requests are reviewed within 48-72 hours of receiving your item. We will notify you once we’ve received and inspected your return, and let you know the status of your refund request. Depending on your payment method, please allow 2 to 4 weeks for refunds to be processed.


 

Please read more about Returning products to us in our Terms of Sale here.

The Experience

Enjoy the luxury of owning exclusive Curated Factory Selections—where comfort meets protection and smart patented design. Each piece is made to give you a life-changing experience by keeping you comfortable and protected from leaks. Absorbing up to 12 tampons of fluid so you can focus on what matters every day.

The Difference

Every piece is handcrafted with care, featuring tiny variations that are hard to notice. But the real difference is clear—each piece is wrapped in double layers of Lenzing modal fabric, offering a silky softness, natural moisture control, and breathability. This is premium quality you can feel.

The Craft

Experience period care that matches your high standards. Created for those who want the best, The Period Undie is built for your busy days. We spent 19,000 hours refining 57 designs with 49 premium fabrics, focusing on comfort, performance, and durability. Every detail is designed to prevent leaks and discomfort, ensuring you stay fresh and dry. We understand time is valuable—our period care is designed to keep you focused on what matters most to you.

The Value

Due to high demand, our Curated Factory Selections are limited. Get up to 34% off and up to $130 off multipacks, plus free shipping across Australia. We’re so sure you’ll love these period undies that we offer a 60-day risk-free guarantee on all multipacks. Try a pair and see the difference. This is designed for those who want the best in period care—a choice that reflects your high standards and taste.

Don’t miss this chance to make a change. Act now—this exclusive offer won’t last.

(*Limited to one multipack per person.)

We know this might feel risky

We get it. Trying something new, especially when it comes to period care. But with [pee chee cheex], you have nothing to worry about.

Here’s why:

With our 100 day Risk-Free Guarantee for all multipacks, you can try [pee chee cheex] with no dramas. No pressure. Try just one pair from a multipack, and if you don’t love it, return the unopened undies for a full refund.

See? No pressure at all.

And guess what? We’re adding FREE Shipping and Returns on any multipack too!

So, with nothing to lose, let’s take a look at why [pee chee cheex] multipacks are the smart choice.

Stop Throwing Away Money on Disposables—Choose the Smarter Option

Most of us spend $15 to $20 on disposables, every month—that’s over $200 a year, literally tossed away on single-use products. And that doesn’t even include the cost of replacing stained underwear and towels from leaks.

A [pee chee cheex] multipack is just under $150. So naturally, switching to a multipack pays for itself over and over again.

Not wasting feels good. But being ready for anything your vagina throws at you… that’s the game-changer.

So…

One Pair Will NOT Do It

Sure, one pair might get you started, but it’s not enough for your whole period. Imagine running out mid-cycle—scrambling back to disposables? No thanks!

That’s why a multipack gives you freedom and confidence for your entire cycle—whether it’s a light day or a heavy one. Never worry about running out or having to go backwards and resort to disposables – again!

You Can’t Get Simpler

Think about it: with a multipack, you’ll always have a fresh pair ready. No more last-minute panics, no more waiting for that one pair to dry. Just grab, wear, and go.

It’s like slipping into your comfiest undies, but with built-in period protection.

When it’s this easy, can you really imagine going back?

You Don’t Need to Make Trade-offs

Let’s be real: you don’t need to juggle tampons AND pads just to feel safe. [pee chee cheex] multipacks gives you full, comfortable, leak-proof protection. No more juggling multiple items. No more panty liners. Get peace of mind that comes with reliable protection, in one product.

Here’s where it gets even better: by choosing Pee Chee Cheex,

You’re Embracing a Natural Solution

…that doesn’t stick around for centuries like disposables do. When you Switch & Save with multipacks, you’re not just saving money—you’re saving the planet. Each pair is 85% compostable and biodegradable, ensuring that when they’re done, they return to the earth instead of polluting it for generations.

Every small step adds up. Start today - choose one multipack here and join [pee chee cheex] community - making a real difference, one period at a time.

📍 Quick heads up:

At the end of this post, you’ll find an exclusive reader bonus. 👀 It disappears in less than 5 days.

The Fight About Period Underwear - Explained

The Fight About Period Underwear - Explained

Who wins: chemical odour-control or trusting your body?

It’s reunion night.

Tonight’s fight:

Do we trust period underwear with chemicals to mask odour…
or trust the body instead?

────────

On one couch: 💄 Chemical Chloe

Queen of “odour-control technologies” and “fresh-for-50-wash promises.”

(Joined by her besties: Antibacterial Amy and Fragrance Felicity.)

Chemical Chloe looks flawless under artificial light.

But we’ve all seen this.  
Under natural light, the bronzer is a little overdone.

She’s been in a few cat fights.  
She knows how to throw shade, mask drama, and rage-bait.

Her arguing style?

Full Housewives energy.
Yelling. Cheap shots.  
The occasional tear wiped with a manicured finger.

Their view: her whole “mask it” routine can create doubt around what’s normal and natural.

Chemical Chloe doesn’t care.

She pretends she “woke up like this.”  
That’s the reality part of reality TV.

She’s not here to explain.  
She’s here to go for the jugular —  
and that’s when it gets personal.

────────

On the other couch: 🌿 Odour Ophelia

AKA: “I tell it as it is.”

Ophelia is not subtle.

She’s unfiltered.  
Unapologetic.  
And armed with receipts.

But lately, her witty style has been kinda entertaining.

Calm… She doesn’t shout.

Precise… She breaks things down,  
point by point.

Quietly dismantling…  
Every odour has a reason.  

Every change has a cause.

She’s not even sure how she got dragged into the drama —
and so far, she’s managing to keep her cool.

────────

Side conversations stop.

The studio audience leans in.

A friend reaches for Ophelia’s arm.  
“Keep it together.”

Ophelia takes a slow sip of champagne.

Chemical Chloe flips her hair and mutters,

“No honey… I don’t think that smell is good for you.”

Ophelia raises one eyebrow.

“Don’t call me honey…
how do yooouu know what’s good for me?”

Chemical Chloe slams the couch. 

“THAT’S MY OPINION!”

Silence.

That escalated from zero to 100 fast.

Insults fly.  
They talk over each other.

The producer tries to intervene.

“Hold on…”

No one listens.

“HOOOLD ON!”

With clenched fists, he snaps:

“SHUT UP!  
MIA — please come out here. They’re going off the rails.”

────────

Enter: ✨Modal Mia

Elegant.  
Composed.  
Commanding the room like a goddess draped in silky, breathable fabrics.

She steps between the couches.

“Ladies. This fight is pointless.
Every woman deserves the truth."

Chemical Chloe crosses her arms.

Odour Ophelia leans back, nodding.

And that’s that.

Modal Mia doesn’t argue opinions.
She settles things with science: airflow and smart fabrics designed to manage odour naturally.

────────

Wondering what’s really in your period underwear?

We explain what others don’t.

Learn More 👉 is your reusable period underwear hiding unwanted chemicals?

With care,

 💛

The Pee Chee Cheex Team

Next article Where Period Undies Leak First

Subscribe to Get Your 15% off code.

Plus our Peachie subscribers usually hear about our best offers first and often better than what's shown in our ads. That's assuming you see the promo in an ad at the right time.

We also share insightful stories and little behind-the-scenes bits too, not just promos.

Pop your email below and we’ll send your priority code 👇

📍 Where do we send your priority discount code

🔒 (You’ll need to confirm your email so we can send your code. This helps keep bots out and your discount secure.)

Customers rate us 4.7/5 based on 92 reviews.

Let customers speak for us

from 92 reviews
Amazing! Life changer!

I absolutely love these. I have actually said to my partner that for the first time in my life I am looking forward to my period. They have become my go-to underwear for every occasion, regardless whether that time of the month has arrived or not....walking the dog, working in the office, lazing around.

Sumera L.
Merindah Hi-Waist Regular Heavy
Just right for me and my tween

I bought these to test if they are a good option for my tween who has not yet started her cycle. They are great! Snug yet comfortable fit, I feel dry and fresh even through yoga and high intensity workouts.

Silvia C.
Merindah Hi-Waist Super Heavy
Feels Amazing!

This product feels so safe, clean and secure, I am convinced!

Kristy S.
Merindah Hi-Waist Regular Heavy
Comfy and absorbent.

Comfortable, absorbent, perfect fit. It's definitely worth giving them a try. I'm ordering more!

Natalie K.
Merindah Hi-Waist Super Heavy
Surprisingly Amazing

I was a bit skeptical at first but after reading positive reviews I thought I'd give it a try. Holds your period well and keeps you feeling dry all day. It was also very easy to wash and I love the natural material it's made from because it's quite soft!

Claire W.
Merindah Hi-Waist Regular Heavy
Actually works!

Perfect fit, comfortable, and I am amazed how dry I felt all day.

Christine F.
Bunji Bikini Regular Heavy
Life saver at work

Bought these as I work in early childcare, so lots of picking up kids, jumping around, dancing and laughing which all can trigger a small leak. Was tentative about these, so decided to buy a pack and test out one pair on their risk-free guarantee. Well, after one day at work with no embarrassing moments, I decided to keep the rest.

Sara P.
Bunji Bikini Super Heavy
Unbelievable undies

These new undies have exceeded all my expectations in terms of comfort and effectiveness. I wish I had them in high school.

Valery D.
Bunji Bikini Regular Heavy