These glasses are the 55mm version. I have large head, so needed sunglasses that don't pinch. These are perfect and are proportionate for my face. This is the first time I've purchased New Wayfarer (always had the traditional style), but really like the slightly rounded edges. These are a real bargain; I found the exact same model at a couple of other stores for roughly double the price. As always, authentic RayBans are high quality. Frames are made in Italy.