Well, yes of course I have seen these sunglasses in the TV series sherlock holmes. So, as a matter of fact, the round sunglasses are quite popular and commonly seen in the world. You could just find a lot of them of different colors at Amazon or Alibaba, where loads and loads of round sunglasses are on sale, and you have a lot of options to find exactly what you want, and the prices are attractive.
Yes, I have seen the round sunglasses that sherlock holmes wear, which is gold frame "John Lennon" Sunglasses. With good material and sturdy in construction, it may lead a new fashion trend. Also, you have no need to worry about its UV protection. Here, I give you a website where you can find the sunglasses.
Some of my friends bought several pairs of the round glasses on eBay, such as retro round frame lens sunglasses and John Lennon sunglasses round hippie shades retro colored lenses. As one of the biggest outlets' retailer in the world, eBay offers so many stuff that you can image. Of course, you can get everything that you wanna at a deep discount and great qualities on eBay. In a word, eBay makes your life much more convenient.