This 1/4 face respirator is made by Envo and is a One Size. Its model is the Envo Classic and it costs about USD49. It has a Med/Low nose bridge height, and its facepiece is made of Silicone "gel". The width min and max distances, in inches, curving from mid cheek to mid cheek are 3.4 and 4.6 respectively. The distance in inches, straight up and down in the middle along the nose line is a minimum of 3.1 and a maximum of 4. The average depth of the mask is 0.7 inches. You can find more information about this mask at https://envomask.com/product/envomask-n95-respirator-kit/. This mask weighs about 100 grams. It comes with the option of earloop & headstrap, and comes with or w/o exhale valve