The only proven Sunnah is to start with the right hand and then proceed to the left hand. There is no proven sequence when it comes to the fingers from the Sunnah, although according to Imam Nawawi, the sequence is 1. Right forefinger, 2. Right middle finger, 3. right ring finger, 4. right pinkie, 5. right thumb, 6. left thumb, 7. left pinkie, 8. left ring finger, 9. left middle finger, 10. left forefinger than proceed to the toes, beginning with smallest toe of the right foot, moving left until you reach the smallest toe of the left foot