Using a measuring tape (the soft, flexible seamstress kind not a flat ruler), place the tape over the bridge of your nose and follow the natural curve of your face. Use the dimensions from our size chart below to see how the mask will cover your face. Note that our ear straps are stretchy and adjustable to help create a secure fit once the mask is on. When measuring the vertical dimension, start from the middle of the bridge of your nose, essentially where the mask will sit along your nose during wear. 

Click here to download our printable measuring tape.

Our 3-D masks are designed to fit closely and snugly to your child's face to create a secure fit. If you measure your child's face and find you prefer more coverage for their face size or shape, you may consider sizing up to the teen/adult size.