Less Expensive Than StickerMule, But Poorer Quality
I was looking for an alternative to StickerMule's matte 3" square stickers and came across the MakeStickers site. Ordering was easy, the price was great, so I was really hoping for both quality and price, but unfortunately, the stickers that I received, when compared to the StickerMule ones seemed to be less vibrant, less colorful than the StickerMule ones. If you are looking for mass quantities of stickers to hand out for free, then MakeStickers is probably good for you, but if you are looking for premium quality stickers to give out to Patrons or fans, then you might want to try StickerMule out, as they seem to have the edge on quality, whereas MakeStickers has the edge on price.
Make your decision, and good luck!