I’ve used thick, Jazz-size picks for over 30 years. It was Jazz 2.0 Stubbies for over 20, then I hunted for better. Finally landed on Jazz III Ultex for size, feel, and tone. The JPs are great, too, but are a little bigger than I’m used to. Despite the different coloring, those are also made of Ultex, and both last a VERY long time, even with aggressive playing. They’re bith around 1.5 to 2mm, but are thick enough that I don’t care which it is.