This shade fits perfectly on the 10' x 12' Grand Resort Lake Geneva Gazebo.
I found the description on the website to be lacking. The size isn't clear, but this fits 10' x 12' gazebo. It's not a "replacement curtain" because the gazebo comes with a screen only.
This curtain can be used in addition to the screen, the gazebo has two tracks. It's a good product and works as expected.