I've played these picks for a long time in the past and still have many left, these picks are a little less than 3/4 the size of a standard pick and they are really hard to drop. The small size makes it easier to glide accross the string with minimal effort, you might want to try these if you like playing fast metal riffs, shred solos with alternate and sweep picking and quick jazz/fusion licks. I don't recommend using them on an acoustic guitar, because the thickness and the material create a big low end bump which makes strumming/funky chord sequences sound boomy and "wrong" and also awkward to play due to its small size. These picks are pretty good picks for their specific applications and I think every intermediate/pro player should have atleast one of them around, both on stage and in the studio.
Plectrum Set Kirk Hammett Nylon Jazz III Signature Picks Player's Pack, Thickness: 0.88 mm, Average size, V-shaped recess for better grip, Bevelled edges, Rounded tip, Colour: Green, Set of 6 picks