The tray table is compatible with any four-legged couch, sofa, chair, lift chair or recliner. The front and rear legs of the chair must sit on top of the base pads to hold the tray in place. The base pads adjust in depth to fit chair legs 20-36 inches apart. If your chair does not have four legs, has a round base, or has legs with depths shorter than 20 inches, deeper than 36 inches, this tray will not work with your chair. Before purchasing, we recommend measuring the depth between the front and rear legs of the intended chair to make sure they fit in the 20-36 inch compatibility range.