Seed catchers are made from 100% cotton & made to the dimensions of your cage. They will fit any shape of cage. These seed catchers are approximately 9 inches wide with elastic on the top & bottom & can be made to fit up to 100 inch diameter cage in the personalization box please let me know the dimensions of your cage as well as a color of fabric you would like as I have many. Due to the handmade nature of this item, color may vary slightly. All items in my shop are handmade with love by me in a smoke free home. Custom Bird Cage Seed Catcher