Well, you're not going to believe this! I was reading about it more on etsy and it's only 15 inches across. Which means the bag is probably smaller than your computer screen! And you're never going to believe what the seller says. And I quote: "The pictures shown on model may vary from what you expect due to the size of model(s)." It's made in Malaysia, but are the people there really THAT small? I never knew.
I think I'm just going to make one. Or attempt to make one. Which means I'll be making my own pattern to some extent. This should be an adventure!