I received this from an acquaintance, but I'm selling it because I haven't had a chance to use it. I measured the size and found it to be XM size. Please refer to photos 2 and 3. Please check the condition of the product in the photos. If you have any questions, please feel free to ask. The following is a product description: The OAKLEY FLIGHT DECK XM features Neon H1 Yellow Iridium lenses and offers a comfortable fit with its Asian fit design. Brand: OAKLEY (Oakley) ● Product Name: FLIGHT DECK XM (M) Flight Deck XM (M) ● Model Number: OO7064-15 ● Fitting: Asian Fit (Japan Fit) ● Colors ・ Frame: Disruptive Neon ・ Lens: HI Yellow Iridium (Yellow Mirror) ● Materials ・ Frame: O Matter ・ Lens: Plutonite (Polycarbonate) ● Visible Light Transmission: 78% ● UV Protection Rate: 99% or more ● Size ・ Frame Width: 175mm ・ Frame Height: 93mm ● Specifications/Features: Spherical lens, double lens, compatible with glasses ● Accessories: Lens cloth pouch