The ticket says "Add a wishlist to the store." Before you estimate it, what do you want to know?
Answer it out loud before you open anything. The value of the flags below is in comparing them to what you actually said.
The situation behind the question
The PM wrote the ticket after a competitor launched one. It has a mock of a heart icon on the product page and a "My wishlist" tab on the account page. Refinement is tomorrow and the team is expected to give a size.
What it is really testing
Whether the candidate can decompress a ticket that arrives as a solution. A wishlist is an answer; the interesting part is which question it answers — remembering products, sharing gift ideas, waiting for a price drop, or matching a competitor — because each one implies a different first version and a different way to know it worked.