I first bought D-grip picks at a local music store… there were various colours, each colour relating to a different thickness. I found the 1.00mm to be ideal for my needs… I’m in my 60’s and the skin on my fingertips is as smooth as marble, so a standard pick often gets easily dislodged from my grip! The D-grip pretty much solves this issue, for me, and when my original pick started to wear, I was disappointed to find that my local music store no longer stocked them. Thankfully, Thomann DO stock them, so I made a bulk purchase! Very happy guitar strummer. :-)