This mask is NOT wearable for the average adult face with cheek to cheek bone width wider than 125mm not because it is not wide enough but because it has been designed with 2 side surfaces that incline towards the inside of the mask drastically reducing the available space making impossible for the face to fit inside. If your face width is slightly higher than 125mm you may resize the mask close to 8% and make it wearable. But if your face width is a lot larger than 125mm (average adult face width is up to 160mm) the mask is NOT wearable. I contacted the creator of this mask and after several messages with detailed description of the problem he suggested to use a heat gun to deform the mask to make it wearable, which is impossible to do without burning your face in your effort to deform the mask uniformly. He also stated that he is NOT willing to fix the mask properly with 3d editing programs to make it wearable for the average adult face, despite the fact that it would be really easy for him.