Most good quality masks, which includes all models we sell, will fit most faces. See this chart... Average Head Sizes If we define the 50th percentile as "standard" then any of our masks will fit.

Our DGX Gears Ren and Compact models tends to also fit faces narrower than standard while the Rio and Ultra models tend to also fit faces wider than standard. However, in most cases it is just guess and other factors such as the size of the nose can affect the fit as well. Regardless, if any of our masks does not fit to your satisfaction, you may return it, see our Return & Refund Policy.