A review for Circle stickers by Travis Barnes.
Just 100% great things to say about Sticker Mule. I've ordered 3000 stickers from them, and the quality and colors can't be beat. I tried a number of different sticker vendors, and the Sticker Mule color matching, cut, and pricing is top notch.
Tip: I include the CMYK of all colors in the notes field, and they've never messed up, going on 9 different stickers with them.