Choosing the right length stick it depends on a player height.
If your height is between 135cm(4'3") - 150cm(4'9"), we recommend using 34,5" sticks.
If your height is between 150cm(4'8") - 164cm(5'4"), we recommend 36,5" sticks.
If your height is between 165cm(5'4") - 188cm(6'2"), we recommend 37,5" sticks.
Once you're a bit more advanced and you've tried out different sticks you'll find your preferred length.
The most popular Senior lengths are 36,5" and 37,5".
36,5" is used by most players and a good starting point for all senior players.
37,5" is becoming more popular and has added benefits once gotten used to - longer reach in tackling and longer reach for skills.