London is a flat-top square, a broad acetate front with a level upper edge and rounded lower corners, aligned with the wide rectangles and bold squares now leading men's optical. Product Details Frame: Acetate Lenses: Demo lenses, ready for prescription Hardware: Working rivet hinges Size & Fitting Size: 52-19 Medium Temple length: 140mm Face Coverage: Standard. A balanced lens front for those who prefer to cover an average portion of the face. Bridge: Standard Fit. A balanced bridge that sits securely and suits most nose shapes. Sold exclusively through authorized retailers.