This 1/4 face respirator is made by O2 and is a size Low. Its model is the Curve and it costs about USD40. It has a Med/Low nose bridge height, and its facepiece is made of unknown material. The width min and max distances, in inches, curving from mid cheek to mid cheek are 2.5 and 3.75 respectively. The distance in inches, straight up and down in the middle along the nose line is a minimum of 2.75 and a maximum of 3.75. The average depth of the mask is 1.55 inches.  This mask features a combination headstrap/earloop.