I had received a set of Southwest glasses several years ago as a house-warming gift. I have long wanted a 2nd set, but had no idea where to find them. When I discovered these, I used customer service to verify the size, etc in order to know that I was getting the exact same set as I had received four years earlier. They were very helpful. I am so happy to now have two (matched) sets of glasses, total of eight. I love these glasses!