The Trigger Finger Solution (TFS) provides a cushioned pad at the base of the finger (A-1 pulley) to relieve pressure during daily activities without interfering with hand functions. The TFS assists in possibly reversing trigger finger and identifying the cause of inflammation as well (which is often from handling certain objects). For size, measure finger circumference mid-way between the base of the finger and the PIP joint. The Extra Large is sized for a finger circumference of 3" to 3.4" (7.6 - 8.8 cm).