Randolph Engineering Aviators, says "52-20" (52mm, small). I bought these from the forum in 2011 for about $40 but just bought a new pair of aviators, so would like to sell these to make room. I bought these originally because Mad Men's Don Draper uses these. I only wore them about three or four times since I normally use sports-style sunglasses for athletic activities. These were my 'suit' sunglasses. A few scratches on the stems, but overall good. I don't have the original case, the original owner never sent it to me. Priced easy to sell, includes shipping to CONUS.