Most of what goes wrong with an order in this category traces back to one of two details. Neither is complicated, and both are on the product page already.
Acid-free is stated or it is not claimed
We only carry that wording where the packaging carries it.
Heat weakens adhesive
Keep tape and sticker packs off a sunlit shelf and away from a damp wall.
Why we publish it this way
Every set is listed with the piece count printed on its own packaging — if the pack says 320 pieces, the page says 320 pieces, and if it says nothing we leave the field empty.
A blank field on one of our pages is deliberate. It means the supplier did not give that number, and inventing one would be worse than leaving it out.