How does this website work? 

Our items are Ready Stock, Preorder and Backorder items. Preorder/Backorder starts every Thursday 12pm and ends at Sunday 11:59 pm! So, check out menu PREORDER every Thursday!

  • Ready Stock: If it is a ready stock item, there is no special mention in title and product intro. It will be delivered within 2-5 business days after order confirmation.
  • Preorder Items: Product title starts with [PREORDER] and the intro starts with closing date of preorder and estimated arrival date. Delivery will take normally 4-6 weeks (Korean brand will produce and send to Singapore. In Singapore, we need to do trimming and quality check for every piece, so it normally takes 4-6 weeks.) For preorder items, you can check estimated arrival status in the menu PREORDER STATUS: Link
  • Backorder Items: Product title starts with [BACKORDER] and the intro starts with closing date of backorder and estimated arrival date. After ready stock items became sold out and the demand is still high, we open backorder during weekly preorder time (from Thursday to Sunday). It will be under menu PREORDER. The process is exactly the same as preorder. 

How do I know if it you do backorder or restock again for my "wish list" items?

Kindly click on the "email when available" button in each product page. You will receive an automatic email notice when the stock is updated. Another way is to follow our social media so that you can get the latest news about restocks, giveaways, and popups. Instagram account is and Facebook is

How do I track my package delivery status?
You can check the delivery update emails from us. There is a shipment tracking URL which you can see the status of your package delivery. 

Can I exchange or return items?
Yes, we accept exchange or return items. Please see this page in details.

Do you offer free shipping?
We offer free delivery service over S$60 orders (for Singapore orders).

$5 flat rate for orders below S$60

I am living in Singapore. How long does it take in delivery?
We support 2-5 business days delivery for orders.

How does Ksisters ships order with ready stock/preorder items?
We will split the order into 2 shipments. Ready stock items will be dispatched as per our usual processing timeframe and preorder items will be sent out when all stocks in the same invoice have arrived. This only applies for local orders.

Do you support international shipping?
Yes, we do. Most countries are available! Read this page for more details.

Do you ship wellness products overseas?

  • Please note that Probiotics requires cold-chained delivery hence we only accept orders with Singapore address.
  • For international customers who would like to purchase other wellness products, pls check with your local authorities on general prohibitions & restrictions prior to purchasing. 
  • In the event of non-compliance to country-specific requirements, please note that international customer will be responsible for any return of products back to Ksisters at your own cost and/or should custom decides to dispose the products, do note that there will be no refund provided.

Can I pick up my items instead of delivery?
Self collection is available on Fridays (3pm to 6pm). Please contact at least 24 hours in advance of your collection so we can prepare your order beforehand.

Due to covid-19, self collection is not available for the safety of Ksisters team. Thank you for your understanding!

My shipment arrived later than expected. Whom should I contact?
Please contact with your name and order number.

I have lost my packing slip. Can I still return my purchase?
Yes, you can. Please make sure to write your name and order number in the return package.

What do I do if I had an allergic reaction?
If you've experienced an allergic reaction to one of our products, please get in touch with our Customer Service (CS) Team  at 
Your input will help us communicate to the brand involved and find an appropriate solution! In your message to our CS Team, please include:
- Your order number/ location of the Popup the item was purchased from;
- The full name of the product that caused an allergic reaction; and
- A detailed description of the symptoms experienced

Our CS Team may also ask for:
- A full view photo of the popup receipt (if applicable);
- Photos of the product; and
- Photos of the affected area

Since different skin types and conditions may react differently to a particular product, we always suggest reviewing the listed ingredients of products to help you identify any sensitivities with certain ingredients/ do a patch test before using any new product.


Probiotics Delivery
As the probiotics requires cold chain delivery service, returns & exchanges or cancellations is strictly NOT allowed. Please consider carefully before purchasing.

Please kindly note that if your orders consist of both PO and readystocks, they will only be delivered together when PO items arrive. If you would like to receive the readystock items first, please make a separate order.
Delivery time frame is 5 - 10 working days. An SMS will be sent one day before the delivery. Should rescheduling is required, kindly reply to the SMS with your preferred date.

Delivery will be delayed and will take longer than usual due to a surge in orders during the festive season.

Ksisters and our logistic/courier partners will not be held liable for any failed delivery. There will be a S$15 surcharge for re-delivery (charges applied by our external partner).

I have more questions or feedback! 
Awesome! Please email us at or message us

(Note: Replies after working hours and during weekend & public holidays will be slower. Rest assured we will get back to you soon!)