I have a question about license

Hi! I’m new here. I was taking a look at the arts, and they are amazing. This community creates really beautiful things.

A client of mine creates stickers for bullet journals and scrapbooking. And as I was looking the artwork I noticed that there are great ones to use as stickers. Now, my question is: Can I use any templates to make a sticker sheet (like a card with some stickers)?

If so, what do I have to take into consideration in order to not break any rules?

Thank you!