These are fashionable fabric masks made just for you! We have options from anime, to more traditional neutral fabrics. Look through the photos to choose your two fabrics. Sizes are mostly based off of nose to chin distance and roundness of the face. These do run big so an average adult female would range between a Small or Medium depending on your facial structure (the female pictured in the sample is wearing a Small). For men we suggest Medium to Large, large beards may want an Extra Large but XL are huge! For kids it is not suggested for children under 2 to wear a mask (this is why small is not offered), younger children (around 4-6) should wear a Youth Medium well, the other ages depend on how wide and long their faces go but most until the age of 11ish shold be good with a Youth Large. If your younger child would want one for their stuffed animals please make a note