The present disclosure relates to a universal armrest attachment having a top element and a track element, wherein the top element includes a vertical member perpendicularly mounted to a table member, and a horizontal member, wherein the horizontal member comprises parallel mortises / grooves. The track element, on the other hand, comprises a second vertical member and a second horizontal member, wherein the second horizontal member comprises tenons / protrusions that cooperatively slide on the parallel mortises / grooves of the horizontal member of the top element such that distance between the vertical member of the top element and vertical member of the track element can be adjusted based on width of the armrest and then fixed using a screw or similar means, the mortises / grooves and tenons / protrusions being so configured to then wedge against each other, thereby securing the armrest attachment in place.