I used the Poundland stickers I bought in Bristol a while back on these cards. There were two sheets of bubble type stickers in a pack, so that’s pretty good value.
The only trouble was, I didn’t like the amount of surplus edging there was on each sticker, so in the end I carefully trimmed it off.
This didn’t give me much surface on which to put any glue, but I used a very fine applicator and I am chuffed with the results.
The card is finished off with a bit of doodling and a handwritten sentiment.