Most of the time, the thickness of the pick depends on the player. But here is what I usually recommend: 0.60mm - 0.77mm: Quite think, perfect for strumming along with an acoustic guitar or a ukulele (not so great for bass guitars or anything faster) 0.80mm - 1.00mm: The perfect mid range pick. Generally, this pick is good for all players from acoustic and electric players - all the way to bass players. 1.14 and beyond: Super thicc. This thick is great for shredding a solo, or blaying a bass guitar.