... obviously not food and used underwear, lol. We were talking Europe, no need to name a country:

from https://europa.eu/youreurope/citizens/consumers/shopping/shopping-consumer-rights/index_en.htm#changed-mind-distance-1 You have the right to cancel and return your order within 14 days, for any reason and without a justification. This "cooling off" period expires 14 days after the day you received your goods (or concluded a contract for services).

Other exemptions are found in the link as well. Think train tickets, groceries and digital content.

When you're getting the actual money back could vary with online purchases, of course. Usually it's the bank that is processing the transfer taking their sweet ass time and not the refund issuer, but I digress. Yay for consumer rights!