The thickness of a padelracket has a range from 36 mm to 38 mm.
According the padel rules, you can’t use a racket that is thicker than 38 mm.
Juniors mostly use a thickness of 35 mm.
Beginners mostly start with 36 mm
Advanced players go fort he 38 mm.
Thin rackets offer more maneuverability and control. Thicker rackets offer more power.