Protect your eyes with these Fit Over Safety Glasses! Measuring 6 1/4" x 6 5/16" x 2 1/4" these clear polycarbonate (PC) glasses are designed to fit over most prescription eyeglass designs. Features include breathable side vents to help prevent fogging when wearing for extended periods, and scratch-resistant and impact-resistant lenses that meet or exceed FDA, ANSI Z87 1:2015, and CAN CSA Z94.3Y:2015 standards.