Large enough for my sunglasses.
I have the large, wrap-around kind of sunglasses you see pro golfers wear.  This was the only case I found whose dimensions suggested it would serve.  It does.  Anything smaller would not have worked.  A quality case, though after 4 months the interior separated from the case, easily resolved with a bit of glue.  After 6 months it is holding up well and seems very durable.
Rating: 5 stars