There is no universal padel grip thickness that suits every player. Hand size, grip preference and racket construction all affect what feels comfortable. The goal is a handle you can secure without excessive tension while still changing grip quickly.
Signs the handle may be too thin
You may feel that the racket moves inside the hand, your fingers wrap too deeply into the palm or you constantly squeeze harder to create security.
Signs the handle may be too thick
A very thick handle can make grip changes slower, reduce feel and make it harder to close the fingers comfortably around the racket.
How overgrips change thickness
Every added overgrip increases circumference slightly. This makes overgrips a convenient way to experiment with handle size without permanently modifying the racket.
Do not judge thickness in isolation
Traction matters too. A slippery handle can feel too small because you are unable to secure it, even when the actual circumference is appropriate.
Make small changes
Add or remove one layer at a time, then test the racket through volleys, overheads and defensive shots. The right size should feel secure without slowing your hand.