3.5 Standard 140 Degree * Measures The Range Of Motion Of Metacarpal Phalangeal And Interphalangeal Joints * Head Has Two Opposing Scales Marked In 5 Degree Increments * Features A Linear Scale In Both Inches And Centimeters On Arm * Deluxe Model Features A Larger Protractor Head And Full 180 Degree Scale For More Accurate Readings * Shipping Carton Size: 9 L X 6 W X 4 H