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 25.5 to 35.5 inches apart. If your chair does not have four legs, has a round base, or has legs with depths shorter than 25.5 inches, deeper than 35.5 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 25.5-35.5 inches compatibility range.