An armrest assembly for attachment to a massage table having a first leg and a second leg that is spaced apart from the first leg is used to support an arm of a person during a massage. The armrest assembly can include a first arm frame, a second arm frame, a frame connector, and an armrest attachment assembly. The first arm frame includes a first leg engager that engages the first leg. The second arm frame includes a second leg engager that engages the second leg. The arm frames cooperate to support the arms of the person. The frame connector assembly connects the arm frames together and allows for relative movement between the first leg engager and the second leg engager. The armrest attachment assembly attaches the arm frames to the massage table. With this design, the armrest assembly is uniquely designed to selectively fit different sized massage tables and the same armrest assembly can be used on many different models of massage tables. Further, the armrest assembly can be easily and quickly attached to the massage table.