The Insanity is the thickest guitar pick we make - 11.85mm thick. There are over 75 grinds involved in making this guitar pick, but its worth every one! Great for Gypsy Jazz playing. Its so easy to hold due to the thick design and gripping effect of this wonderful material. A lot of players with serious hand injuries have told us this is the only pick they can use. I am very touched every time I hear this. Remember, the bigger the pick, the bigger the tone. This is a perfect example of that fact. The Insanity is also a fantastic practice pick/tool. It will teach you to play with a very relaxed hand, wrist and fingers. After playing for a week with this pick, you'll be astounded how much better your technique will be!