As a disclaimer, I do not currently run a sticker shop so all these recommendations are using websites not run by me.
Etsy
Etsy has a lot of options for custom sticker printing. Many of the options however have a minimum order of $15 which will get you multiple stickers.
Min $15 – allows custom designs and custom cuts
Offers single stickers – expensive
Min $20 – but cheaper stickers
Until I have setup my sticker shop, feel free to send my designs to any Etsy shop to get these stickers made. Please only use these for personal use. Do not use them for commercial use.
Coki Art 