The curl of the pick is not big enough so it doesn't fully wrap my Herco flat thumb pick but instead digs in. I love the concept of this pick because I do mostly fingerstyle but sometimes switch to flat picking in the same song and a traditional thumb pick makes that difficult. As I enjoyed the shopping experience I'll definitely use this site again for buying strings and guitar accessories, thumbs up from me: I purchased the medium guage as that is what I like for flat picking. Summing up, it arrived after two weeks from the day I've completed my purchase, Herco flat thumb pick is a decent time considering I live in Israel- mostly, on other sites it takes about a month for purchases to arrive. I recommend these to all fingerstyle guitarists- they produce a loud and deep bass sounds, and allow to alternate between fingerpicking to strumming.