TheZIZouoeSofa Armrest Tray is designed to fit sofas with armrests measuring at least 6 inches wide lt has two metal weight gainers installed atthe bottom, and it has a grid-like design on the back, both of which make it fit stably on the armrests of sofas of various materials without slipping off.At the same time,This product is made offood-grade silicone material, which is safe and reliable. You can also simply place the couch tray on anv flat surface