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. Extra Small is sized for a finger circumference of 1.75" to 2.25" (4.5 - 5.7 cm). The Small is sized for a finger circumference of 2.25" to 2.5" (5.7 - 6.4 cm). The Medium is sized for a finger circumference of 2.5" to 2.75" (6.4 - 7 cm). The Large is sized for a finger circumference of 2.75" to 3" (7 - 7.6 cm). Please note, due to anatomical differences or swelling, a larger size may be needed. The Extra Large is sized for a finger circumference of 3" to 3.4" (7.6 - 8.8 cm). Please note, due to anatomical differences or swelling, a larger size may be needed.