Shueisha has granted permission for fans to use these images as free clip art, but Irasutoya also kindly reminds fans not to use them in ways that would be damaging to the reputation and image of the One Piece series.
The full set of 20 illustrations can be found here.
Eiichiro Oda’s smash-hit adventure manga One Piece recently released its 1000th chapter, and to celebrate Shueisha has teamed up with Irasutoya, a website that specializes in free clip-art with a cute aesthetic, in a collaboration that features adorable illustrations of the Straw Hat Pirates, their allies, and their enemies.