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GIR Mask Sizing Chart and Fit Guide

GIR Reusable Face Masks are available in two sizes, Standard, and Kids. If you find your measurements to be closer in line with the kids mask, don’t be afraid to use it if you’re a grown up. After all, adults are just big kids. 😀

How to measure

Using a piece of string or shoelaces, measure the distance from the top of your nose, to the bottom of your chin. Then, measure the distance between your cheeks.

GIR Masks are designed to be flexible. They will stretch and conform to your face, making for a custom fit. Because of this, use this sizing chart as a suggestion. Larger faces may find the mask tight, while others find it loose. Use the included GIR sizing clip to personalize your fit.




Standard Mask Sizing

Best fit for individuals with faces that measure 5” cheek to cheek or larger.

Best fit for individuals with faces that measure 4” nose to chin or larger.




Kids Mask Sizing

Best fit for individuals with faces that measure 5” cheek to cheek or smaller.

Best fit for individuals with faces that measure 4” nose to chin or smaller.




Sizing Clip Included

All masks come with a sizing clip included. Use it to adjust the size of your mask.

When will my mask be shipped?

Today's mask orders are estimated to ship within 2-3 business days of your order date!

Personalize Your Fit

Since a tight fit is a good fit, we’re including a small plastic clip in the package so you can hook it behind your head for a tighter fit if you have a smaller head. And if it feels like your filter isn’t secure, or able to stay in place, it’s likely that the fit of your mask needs to be a little more snug across your face and around your head. For the entire mask kit system to be effective, a snug fit is key. Just use the included clip to secure the mask behind your head instead!

How will I know when my order has shipped?

When your order ships, we’ll email you a shipping confirmation with tracking! Be sure to check spam in case our note falls into the wrong inbox.

I selected an expedited shipping method and have not received my order yet. What now?

If you selected an expedited shipping method, your order will still ship out with your selected expedited shipping choice at the time of shipment. We recommend keeping your expedited shipping method since you'll be able to receive your package sooner than if you revert back to ground shipping. However, if you'd like to modify your shipping speed to something slower, send us an email at hello@gir.co and we’ll help you out!

My filter isn’t staying in place—help!

If it feels like your filter isn't secure, or able to stay in place, it's likely that the fit of your mask needs to be a little more snug across your face and around your head. Keep it tight by using the included clip instead (a paper clip or small ribbon will work here as well!). And as always, please be thoughtful about how you place the filter inside the mask; it should cover the air holes and avoid creating gaps where "free air" can flow. Also, you don’t have to rely on the filter adhesive. It’s there if you want it, but a pressure fit will work best because silicone is naturally quite non-stick.

What if I lose the included clip?

No problem! A paperclip or small ribbon will work just as well. Unfortunately, we don’t have any extra clips to provide yet, but we are working on getting replacements up and running here at GIR.co.

What are the specifications of the filters GIR is using?

GIR’s masks are not medical devices. They are general-purpose masks. Our filters are made from four layers of material: an outer spunbond nonwoven polypropylene layer to block initial large particles, dust, and liquid droplets. A double layer of very fine, electrostatically charged melt-blown nonwoven fabric to block finer dust particles, bacteria, and virus-carrying droplets, and an enclosing inner layer of spunbond polypropylene to block exhaled droplets.

Melt-blown fabrics are available in a variety of densities with different filtration efficacies. We require a >40g per square meter density for the double melt-blown fabric layer, which supports a PFE (Particle Filtration Efficiency) over 95% at 0.3 microns and a BFE (Bacterial Filtration Efficiency) over 99% for particles at 3.0 microns.

What can I use if I run out of the filters? Can I make my own filters?

In moments like this, anything is better than nothing. We recommend using a certified filter wherever possible, but you can make your own filter to fit the GIR mask. Click here for a GIR filter template you can print and use to cut your own at home.

If you choose to use a household material to cut your own filter, please Google the latest research as some content is coming out that points to the possibility inhaling of harmful particles from certain HEPA materials. We're not doctors and we're just following what's being recommended by authorities. When the pandemic began, common thought was that some HEPA materials were good for homemade filters. Much info has come out that's questioning that popular wisdom. Please use your best judgment and educate yourself. What we can promise is that the 99.7% BFE, >95% PFE filters we provide are lab-tested and certified. Beyond that, we're just offering helpful information with no claims to efficacy or implied expertise.

Do I need to use a filter with this mask?

Definitely yes. Large holes in the silicone allow for easy breathing… and also let the bad stuff in. Using a filter is vital to the mask’s effectiveness. Each kit includes 5 for starters, and you can get 10-pack refills from us right here too.

Who will donated masks be given to?

We’re in touch with area hospitals, grocery stores, and package carriers. We’re getting masks to the front lines of exposure in our immediate communities of NYC, LA, SF, and Chicago. If you know of a hospital or essential business that needs to protect its team and would like to receive a donation or purchase these in bulk, at cost, please email us at helpers@gir.co.

When/where should I wear this mask?

For the duration of the pandemic, you should endeavor to wear a mask when you’re outside, in a public place, or exposed to others. The CDC’s new guidance encourages individuals to wear masks or homemade face coverings in public settings like grocery stores; we’re all adapting to this as a society. Importantly, wearing a mask can prevent you from unknowingly spreading disease in public if you are infected but asymptomatic. You can read more here and reference the CDC’s latest guidance at their website here: https://www.cdc.gov/media/index.html

Can these be returned? Do they come with GIR’s Lifetime Guarantee?

These masks are personal use items and cannot be refunded, returned, or exchanged after we ship them to you. Thanks for understanding!

How do I sanitize my mask, and how often should I do that?

First, discard that dirty filter and wash your hands really well! We recommend sanitizing the silicone mask after public exposure, or whenever you take it off. You can clean it in a number of ways:
• Dishwasher: Wash on medium heat with mild detergent.
• Microwave: Microwave for 90 seconds in a bowl of water.
• Hand wash: Scrub with hot, soapy water for at least 20 seconds.
• Oven: Place the mask in an oven-safe dish. Bake at 300°F (150°C) for 5 minutes.
• Autoclave: Where available, sterilize using an autoclave.
Dry well before inserting a new filter.

How many times can I use a filter?

The filter is good for at least a full day under normal conditions (e.g. not in a smoke storm), but use your best judgment; if you think you’ve been exposed, be conservative and discard the filter. If you’ve taken a morning walk down a quiet street, you can probably use it again to go to the grocery store tomorrow.

Will the kids size mask fit adults with smaller heads?

The kids masks are quite small; if you have a tiny grownup face, they might work for you! But for best fit, you’ll want to ensure that it covers your chin completely. We recommend the medium size mask for smaller adults, rather than the kids size. The medium mask is 5” W x 4.4” H x 0.04” D (12.7cm x 11.0cm x 0.1cm D) and can be tightened behind your head using the included clip for a snug fit. The kids mask is 4.0” W x 3.7” H x 0.1” D (10.3cm W x 9.5cm H x 0.2cm D). It can be stretched quite a bit, but please measure your face carefully. Unfortunately, given the nature of this personal use item and the global pandemic environment, we're not able to offer refunds or accept exchanges or returns for masks—so we encourage you to measure carefully if you're buying a kids mask for grownup use!

What age range does the kids mask fit?

The GIR kids mask is designed for kids ages 4-10. Using a clip (included in the kit), our founder Sam has been able to comfortably fit these on her 3-year-old daughter as well.

Is this product patent-pending?

Yes, GIR masks are patent-pending. Congrats to our amazing design team 🎉



*Shipping and taxes are calculated at checkout.
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