An ~2.5 inch laminated vinyl waterproof sticker.
This product is homemade, and may have slight variations from the image.
Variants (Left to right, Top to bottom):
Luffy
Sanji
Zoro
Robin
Nami
Chopper
Franky
Brooke
Jinbei
Usopp
Getting the full set will come with one of each. If you are not choosing the full set variant, it is only one sticker unless you add multiple to the cart.