GetWetStore RX Scuba Dive Snorkeling Mask Prescription Lenses Ideal for smaller faces face seal size W4 3/8 * H3" Crystal, liquid silicone injected skirt and strap, Double edge comfort seal. Swivel and adjustable buckles, broad peripheral view. Please send us your prescription to info@getwetstore.com or tax to (818) 913-3359 Optical lenses available for NEAR-SIGHTED from -1.0 to -8.5 by increments of 0.5.