This Half face respirator is made by Honeywell and is a size Medium/Large. Its model is the RU8800 and it costs about USD50. It has a Medium nose bridge height, and its facepiece is made of Silicone. The width min and max distances, in inches, curving from mid cheek to mid cheek are 4 and 6 respectively. The distance in inches, straight up and down in the middle along the nose line is a minimum of 3 and a maximum of 5.5. The average depth of the mask is 1.8 inches. You can find more information about this mask at https://sps.honeywell.com/us/en/products/safety/respiratory-protection/air-purifying-respirator-apr/honeywell-north-ru8800-half-mask. This mask weighs about 209 grams. Fits a wide range of faces, including very large