It is the retro style eyeglasses that dame edna wears. If you like such kind of eyeglasses, you could go to the amazon or ebay to have a search. You should better choose the online store with good reputation which will promise the good quality and suitable price. You could go and have a look. The quality of the eyeglasses may be as same as those in the real stores.
Well, generally speaking, there are many people who choose this type of glasses frames. And they can just make you look cooler and nice, and at the same, you can have good vision too. To buy them, you can get them from online shop. For example, you can just buy them at https://www.myshopping.com.au/ZM--1223118998_Dame_Edna_Style_Specs . For the prices, it will just cost you about 19 dollars. You can just have a try.