Here is the size chart for selecting your new Seac Full Face snorkel mask. For this type of mask, the critical measurement is the distance from your chin to your eyes to ensure the mask fits snugly.
It's essential that a full face mask fits correctly, so the silicone edge creates a complete seal against your face. If the mask is too large, water may seep in at the chin or forehead. If it's too small, it will be uncomfortable and may press on your chin. Determine your size by measuring the direct distance from the bottom of your chin up to eye level (bridge of the nose).
