Finger thickness can be exercised in the following ways. In order to facilitate your better exercise, attach pictures.

Step 1: Sit in a third of the chair, with your back straight and your hands and palms stretched forward.

Step 2: Inhale and push your palms outward. Exhale slowly, press the palm down to be perpendicular to the arm, and do it back and forth several times.

Step 3: Relax your palms and wrists, shake your hands and relax.

Step 4: resume sitting posture, straighten your back, straighten your left hand forward and palm up.

Step 5: inhale, pull the fingers of your left hand back one by one with your right hand, and exhale when tightening.

Step 6: the palm of your left hand is down, perpendicular to your right arm, stay and take a deep breath. Switch hands and do it again.

Don't forget to apply hand cream after exercise. Make it a habit. It is recommended to use hand cream to burn fat and whiten Heana.

I hope my answer can help you.