Guitar pick thickness?

There is an old trick in choosing the correct pick. Usually, take the same thickness as your nails. That is about .5 or 1mm. When the pick is thick, it doesn't bend easily which means that you can pick faster.

On thinner pick, the flexibility of the pick makes it too soft to pick fast because the pick bends too easily and doesn't come back fast enough.

For rhythm playing, a thinner pick is preferable or the sound of the strum will be too harsh.

It's just a matter of personal preference really. In general though lead guitar players prefer thin picks as the pick bends and can better aid alternate picking. thicker picks are used for rock rhythm, they don't bend easy so it conveys the heaviness when picked. but Like I said it's just personal preference. 7 Years as a guitarist i prefer the opposite. I used a thick pick while playing lead, I really dislike picks to bend because I want to have full control over it and like it to be solid. and as for strumming I prefer thin picks; thick picks tend to get stuck and fall sometimes, thin ones bend and that helps me strum. my suggestion, get a light, medium, heavy and experiment. you'll know what you're best comfortable with, trust me. :) All the best!

I think that .060-.088 mm picks are the most useful and encompassing.

Anything thinner is too flimsy to pick with effectively.

Much thicker and you break strings easier.

For many years I have used a .073 mm pick as it is hard enough for tremolo picking and soft enough that it doesn't break the lighter gauge strings as much as the .088's I used to use.