I would recommend Sticker Mule (strange name, great product + service)
I have had multiple runs of fridge magnets with them from this website and the speed of delivery + quality has been excellent. They also offer die cut stickers if you’re planning to take over the world with your label design! Just be aware that pricing is in USD… and they definitely reward/preference bulk ordering.
I ordered the stickers for the tops of my current jars from VistaPrint and I am not 100% with the quality of the sticker, the print/screen isn’t as crisp as i’d like and the sticker is a bit too papery and doesn’t handle moisture well (eg. rinsing bottle).
As for price, I think $10.00 for about 350g and slightly more for 500g is fair. When you start selling in 1kg tubs etc. I think the product gets devalued and you won’t have success asking much for that much bulk… I also find people don’t want too much more than about ~400g when bottled with common feedback “we don’t eat that much honey!”.
Keen to hear what others have found… I am always trying to get the right mix of bottling/labelling cost and amount of honey.
I just found they now have a honey label category.