When my son was little, we would end up with a lot of 'stickers',
Kids seem to love them and they came with everything. I still have a ton of them.
Many of these 'stickers' were the same metallic, reflective material as the stick-on-eyes and after the 'sticker' was removed, there was plenty of leftover background, that is if the sticker even got used at all.

...... I don't think I've ever bought stick-on-eyes