The Small Upper Extremity Support measures 10Ã¢â‚¬Â wide x 10Ã¢â‚¬Â deep and can be mounted on the right or left armrest. Its size and adjustability make it great for supporting a phone, tablet or book or serving as a work surface for writing. The tray is also light weight, making it easy to get on and off the chair. Special considerations may indicate that this tray may not reach the desired position for mouth stick use or bilateral UE use. May be too small for laptops.