Our packs

Size guide

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To choose the right size, measure your pelvis (at the level of the hip bones, see diagram opposite) and refer to the chart below:

Your pelvis
size (cm)
Size
internationnal
Size EU Size IT Size UK
76-78 10/11 yrs 10/11 yrs 10/11 anni 10/11 yrs
79-81 2XS・12 yrs 32 38 6
82-86 XS・14 yrs 34 40 8
87-91 S・16 yrs 36 42 10
92-96 M・18 yrs 38 44 12
97-101 L 40 46 14
102-106 XL 42 48 16
107-111 2XL 44 50 18
112-116 3XL 46 52 20
117-121 4XL 48 54 22

Top

Which absorption to choose?

Our period pants are available in 3 levels of anti-leak absorption, so you always have the right underwear for your flow.

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LIGHT

Equivalent :

  • 1 to 1,5 pads (10ml)
  • 1 towel
  • 0.5 cup

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MEDIUM

Equivalent :

  • 2 pads (15ml)
  • 2 towels
  • 1 cup

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SUPER

Equivalent :

  • 3 pads (20ml)
  • 3 towels
  • 2 cup

ESSAYER AVANT D'ACHETER

30 JOURS POUR ESSAYER AVANT D’ACHETER

1 - Choisis tes articles

Ajoute au panier tes articles dans la limite de 500€. Tu peux les essayer chez toi sans avancer d’argent.

2 - Sélectionne essayer avant d’acheter

Sélectionne Elyn au moment de finaliser ta commande à l’étape du paiement. Entre tes coordonnées comme pour un paiement classique, mais aucune inquiétude tu ne sera pas débité(e)*.

3 - Essaies tes articles à la maison

Profite de 30 jours après la réception de ta commande pour te décider et pour nous faire part de ton choix. Tu ne seras ensuite uniquement débité(e) des articles que tu souhaites garder. Tu as même la possibilité d’essayer une culotte gratuitement en conditions réelles pendant 30 jours. Ce n’est valable uniquement que pour ton tout premier achat et cette offre n’est valable que sur une seule culotte déjà portée. La ou les autres culottes doivent être essayées par dessus tes sous-vêtements.

*hors frais de livraison si applicable.

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FREE DELIVERY FOR ORDERS ABOVE £34 (in the UK) 😍 No customs duties 😍

STUDENTS ? -15% DISCOUNT ALL YEAR ROUND Read more

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product(s)

Compose your pack

Compose your pack

Assemble several models to match your size, your flow and your desires! The more panties you add to your pack, the more you save!

Create my personalized pack
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Test it for real
BEFORE YOU BUY?

Test our panties in real conditions 😉 for 2 whole cycle, and if you're not convinced, we'll give you your money back. No questions asked!

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Discover our teen collection

Ultra-comfortable models in organic cotton from age 10 to size M

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Are you a student? Save 15% all year round

Living serenely with your period shouldn't be a matter of budget 😋

why choose sisters ?

Sisters Republic UK

Free delivery from £34

The sisters will deliver to your home for free within 48 to 72 hours for orders over £34! Offer only valid in U.K. For all delivery details and conditions, please consult the “Payment and delivery” section.
Sisters Republic UK

30 days to change your mind

Did you order the wrong size ? Or perhaps the wrong style ? Did you just change your mind ? Don't panic! With Sisters Republic, you have the option to return your item(s) within 30 days. To be sure your return is accepted, please make sure you comply with all the” Returns and Refunds” page.
Sisters Republic UK

Made with ORGANIC cotton

All our fabrics, laces and elastics are either certified organic cotton or OEKO-TEX standard 100 (the same as for newborns). They are therefore guaranteed to be free of any substances that are harmful to the body and the environment.
Sisters Republic UK

2 275 tampons saved

A single pair of Sisters Republic panties lasts from 5 to 7 years if you take good care of them. And in 7 years, you'll have saved 2275 tampons: 5 tampons/d over 5d periods, 13 times in the year (365/28 = 13) over 7 years = 2275. Ain't life grand 🌞? Obviously, you need several panties for one cycle, but this is just to give you an idea of the savings you can make for your wallet and for the planet.

why choose sisters ?

Sisters Republic UK

Free delivery from £34

Read more
Sisters Republic UK

30 days to change your mind

Read more
Sisters Republic UK

Made with ORGANIC cotton

Read more
Sisters Republic UK

2 275 tampons saved

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over 200,000 satisfied customers.

the menstrual guide

Is it hygienic to wear period panties for 12 hours at a time?

Yes, because the fabrics used in Sisters Republic menstrual lingerie have been selected for their sanitary properties. Bamboo fiber is even a natural antibacterial. Only breathable organic and Oeko-Tex fabrics are used in our panties. Even after 12 hours, the pants remain hygienic and odorless.

Do I have to change my panties during the day?

Because we know that changing your panties during the day isn't very practical (you have to isolate yourself, take off your pants, etc.). Our period panties can be worn for up to 12 hours without leaking, smelling or feeling damp, so it's not necessarily necessary to change them during the day. However, if you have a hemorrhagic flow and feel the need to alter your panties in the middle of the day, our Mia panties can be unzipped at the sides, so you can remove them without taking off your shoes or pants.

Can I use my Sister Republic panties during sport?

Yes, your Sisters Republic panties are ideal for protecting you during sport because, unlike sanitary towels which can slip or fold, the panties-and therefore the absorbent part integrated into them-always stay securely in place. All our models are perfectly suited to sporting activities. However, we particularly recommend the sports boxer, as it's really interlocking and will follow your every move perfectly.

Is it hygienic to soak in your own blood all day?

Firstly, contrary to popular belief, you don't soak in your own blood, because the 1st layer of fabric is breathable and dries very quickly. The airy weave allows liquid to pass quickly through the inside of the panty, leaving a dry feeling on the surface. The liquid is therefore directed, captured and retained by the absorbent fabric underneath, at the heart of the panty. Finally, unlike internal protection such as cups, tampons or menstrual sponges, period panties let the blood flow freely, so it doesn't stagnate in the vagina, which is the main cause of bacterial proliferation (and therefore of the very dangerous Toxic Shock Syndrome).

How long will delivery take?

Our panties are shipped directly from our French warehouses. Home delivery generally takes 24 to 72 hours and is free for orders over £80 (in mainland France). Delivery to a "point relais" can take an additional 24 to 48 hours, and is free for purchases over £40 (in mainland France). When you place your order and select your shipping method, you'll be given an estimated delivery date.

Aren't menstrual pants more expensive than disposable sanitary pads?

It's true that it's an investment at the outset, but unlike other sanitary protection such as pads or tampons, menstrual panties are reusable and can last up to 7 years. A single pair of panties can replace 2275 pads* (over 7 years). So menstrual pants really do save you money in the medium term (* disposable protection saved ⇒ 5 tampons a day over 5 days of menstruation, 13 times a year (365/28 = 13) over 7 years = 2275). What's more, you'll find discounted packs in the store (-10% for purchases of 3 or more products, -15% for purchases of 5 or more products and -20% for purchases of 7 or more products), enabling you to place "group" orders, mixing different sizes and absorbency in the same basket.

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Join us!

With inspiring, 0-taboos posts, exclusive news and promotions, the Sisters are setting the social networks on fire... join the Sisters team!

Save money by choosing the menstrual panties pack.

Choose or compose your own pack of menstrual panties. Menstrual panties offer many advantages as a means of protection and hygiene. Comfortable and leak-proof, they're the healthiest alternative for taking care of your intimate hygiene during your menstrual cycle.

Beyond comfort and waterproofs, menstrual lingerie is an ecologically sustainable and economical choice. No more chemical pads or tampons.

And to make sure you're equipped and comfortable throughout your cycle, day and night, Sisters have designed packs of 3 to 7 panties for extra savings.

Choose your pack

The Sister's team has designed different packs to accompany you through your period.

The Starter pack is perfect for getting started with your new protection. It includes 1 super-absorbent Ginger boxer for the first few days of your period or during the night, 1 Colette panty with Medium absorption, ideal for mid-cycle, and a Sidonie bikini with Light absorption for the last few days of your period.

Who says you can't be sexy during your period? In the Girly Pack, you'll have 3 refined bikinis with lace trim. The first is Super absorbent for the first few days of your period, or on days when your flow is a little heavier, and 2 other bikinis with Medium absorption for other days.

More like classic panties? The Classic pack includes 3 ultra-comfortable menstrual briefs in a classic shape, but just as refined with their little ruffles at the waist. 1 super-absorbent Colette menstrual panty and 2 panties of the same model with Medium absorption.

For each of our packs, you can choose between 3, 5 or 7 panties. Other packs are available on this page, such as the Integral pack for 5 to 7 years of peace of mind.

Compose your pack by choosing the models of your choice.

None of the Sisters packs suits you? Compose your own pack of period panties and take advantage of a 10-20% discount.

For a single pack, you can choose not only several panty models, but also different degrees of absorption for the latter, so you can adapt your protection to your flow at different times of your cycle.

By opting for a pack, you'll benefit from 10 to 20% savings :
- 10% off for 3 pairs of panties
- 15% off for a pack of 5
- and 20% off for a pack of 7.

A smart choice for ordering with friends, since you can also mix panty sizes in your order.

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