✔ 最佳答案
Here is a good tutorial on increasing grip size:
http://www.tennis-warehouse.com/LC/increasegripsize/increasegrip.html
With overgrip, you do not need to remove the original grip. Just make sure you wrap the over grip very tight (especially at the butt cap); otherwise, the overgrip will peel back and give you blister on your fingers.
Top three overgrip:
1. Wilson Pro Grip
2. Yonex Super Grap
3. Tourna Grip Original Overgrip Blue