Typical bra sizing is super confusing, and that goes double for younger girls who are looking for a soft top and barely have any boobs to begin with. We’ve simplified the situation by sizing using a single measurement.

size measure

TO MEASURE YOURSELF FOR AN OOMBRA, all you need to do is take a soft tape measure and wrap it around the biggest part of your chest - usually this is the nipple line, which means the part of your chest including your nipples. Make sure the measure is wrapped straight around you, without dipping far down your back or riding high up towards your neck. If you like tighter-fitting garments, pull the tape measure so that it is snug; if you like everything loose, measure with the tape a little loose as well. Your measurement is the number of inches in circumference.

Each OOMBRA size covers a 2" span. If you are right on the cusp between sizes - let’s say you measure 30" exactly - then choose to go with the bigger or smaller size based upon whether you like your garments to fit looser or tighter on top.

ONE BIG SIDE NOTE ABOUT OUR SIZING: if your boobs are bigger than a B cup in traditional bra sizing, then the difference between your chest circumference and your ribcage circumference is greater than 2". We have designed our bigger sized OOBRAs to accommodate for bigger boobs, but some girls have much smaller ribcage measurements than chest measurements. If this describes you and if you are right in between sizes, we recommend sizing down so that the elastic along the bottom fits nicely at your ribcage.
The two outer layers of the OOMBRA are jersey material made from 46% cotton, 45% modal and 9% spandex. The middle panel is made of polyester.
Absolutely! We recommend hand washing your OOMBRA in warm water and then laying it flat to dry, but you can also just throw it in the washing machine and tumble dry low.
If your OOMBRA smells a little funky, throw it in the wash! But there may be many times when you wear your OOMBRA for a bit and then put it away without washing. Unlike underpants, bras and top-support garments do not always need to be washed after each wear.
Yes. So long as you chest circumference (the length around your ribcage and boobs) measures between 24 - 38", you can wear an OOMBRA. If you measure bigger than our current OOMBRA sizes, we’re growing quickly and hope to have your size soon. The best way for us to get there is to hear from you the size you need, so please share with us at


Yes, OOMASKs have a built-in filter layer made of non-woven polyester which has been fused to one of the outer-jersey layers. This material is similar to the polyester used in N-95 masks. Research shows that non-woven polyester creates a tortuous path – particles adhere to the fibers without necessarily blocking the open spaces, which means that air can flow easily across the filter (Want more filter info? Check out this chapter from a textbook or this).
Experts currently recommend that people should wear a mask or facial covering any time they are outside the home and close to other people. Masks can help slow the spread of viruses like coronavirus, particularly when people are gathered indoors or when they are closer than 6 feet apart. If someone in your home is sick with coronavirus, you may want to wear your mask around the house as well.
Almost! They are not recommended for anyone under the age of 2. The American Academy of Pediatrics has info about masks here.
OOMASKs come in two sizes.
S/M is designed to fit smaller faces. It measures 7¾” across and at its tallest point (nose-to-chin) it is 4½”. The OOMASK sits away from the face a little bit, so if you are using a soft measuring tape, remember that the mask will curve out slightly. Kids under the age of 12 and teens with smaller bone structure fit well into the S/M.
M/L is designed to fit larger faces. It measures 10” across and at its tallest point (nose-to-chin) it is 5¼”. Just like with the smaller size, this OOMASK sits away from the face a little bit, so if you are using a soft measuring tape, remember that the mask will curve out slightly. Most teens, particularly those with larger bone structure, fit well into the M/L. (Adults fit well into this size, too!)
We have partnered with a number of organizations to distribute OOMASKs to kids, tweens, and teens who have limited access to masks. Our launch partners include: Eat.Learn.Play, Supplies Save Lives, Covenant House, Alexandria House, and No Kid Hungry.


We are happy to accept unworn and unwashed OOMBRAs within 14 days of receipt.

OOMASKs are NOT returnable given the nature of coronavirus and the fact that the OOMASK is worn around the nose and mouth.
To exchange or return an OOMBRA, begin by going to our ONLINE RETURN CENTER. Once you have completed the steps (they're very quick!), mail the OOMBRAs you are looking to exchange or return to:

3421 Verdugo Road, #7
Los Angeles, CA 90065

Remember, items must be unworn and unwashed.
We do! OOMBRAs may be returned for a refund within two weeks of receipt. Exchanges and returns must be in new condition, unworn and unwashed. Customers pay for the return shipping.
Since the coronavirus pandemic began, most shipping services became overwhelmed and slowed their delivery times. Both USPS and UPS are experiencing delays, but in advance of the 2021 holiday season, USPS has put out a warning that their deliveries will take up to 30% longer from the already lengthened timelines and they've increased their rates at the same time. And to add to the frustration, USPS is particularly slow at updating its tracking information online. We are as bummed about this as you are, and apologize for any delays!
FREE USPS First Class shipping with your $50 US order, or $5 domestic shipping for orders under $50.

For non-USPS shipping options, shipping cost is determined by the package weight and destination.

To get an accurate shipping cost, please add the items to your cart and enter your mailing address at check out - the system will give you an estimate for shipping with various USPS and UPS options.
For international customers, we offer $20 DHL shipping with orders of $150 or more. Your package should arrive at your doorstep within 5 business days, with tracking available as it makes its way to you. USPS Priority and First Class Mail may be a bit less expensive, but these carriers have a higher tendency to lose international packages. UPS rates tend to be rather exorbitant and you may be faced with a custom brokerage fee NOT included in the shipping rate.

Please note that you may be charged additional customs duty fees at delivery NOT included in the shipping rate. These fees vary widely from country to country, and there is nothing we can do to prevent them.

Attention Canadian customers! Our system will offer you UPS as a shipping option that may seem attractive, but we suggest NOT using UPS for orders going to Canada as they sometimes present you with a separate and additional customs clearance bill (on top of the customs duty) for $50 or more. eek!

Finally, while we wish we could make the shipping experience totally seamless, please note that packages sometimes get lost and we are NOT responsible for these lost packages.