As we all know, you get what you pay for. So it is wise for you to choose the one with a good reputation and good after service. Those with a higher price may have a good quality, or can indicate that they have casted a lot of money into their public recognition and projected a good public image. A brand name on the box can simply identified what was inside. You can choose GUCCI, ARMANI, channel and so on. Some glasses come in very cheap prices because of shoddy workmanship. These can not be enduring and its shapes, colors and sizes can be completely different from what you have seen in their homepage. So, it is wise to listen to the former buyer and buy sunglasses from a legal source. Well, generally, you can require the basic figures of the frame including lens width, lens height, bridge distance and arm/temple length, which can be labeled inside of the sunglasses temples from your online store merchants.