Blue Bear Face Masks are made to the highest non-medical standards, filtering 99.5% of particulate matter according to independent lab tests. Our Blue Bear Mini Disposable Face Masks ship from the USA and come with a Satisfaction Guarantee - if you are not satisfied, we will refund or replace you order. These mini disposable face masks measure 5.7" x 3.7" and are designed for maximum comfort and protection. The Center for Disease Control recommends that "children over the age of 2 wear a face mask." It’s important to make sure your child’s mask fits - a mask that doesn’t fit well can’t do its job. Your child’s mask should fit snugly (but not too tightly!) on the sides of their face and fully cover the nose and mouth. The easiest way to make sure your child’s mask fits correctly is to buy a child-sized mask. If it doesn't fit, it doesn't protect.