Eyeglasses Guess GU 1878 GU1878 052 Lens width: 53 millimeters Buy with confidence! Authorized Retailer. Authenticity Guaranteed. Full retail package with all accessories. You can return this item for any reason and get a full refund: no shipping charges. The item must be returned in new and unused condition. Go to Your Orders to start the return Print the return shipping label Ship it!