A followup rant is that's it's actually useless to send the order back.
Those feet cost something like 4.95 for a set of 8, and 2,95 shipping. Total is 7.90 euro's. The box they come in doesn't fit into the mailbox, so I'd have to send the order back as a package, for 6.75 euro's. I'll recoup €1.15. Whoopy.
If I remember correctly, shops should reimburse return shipment costs (or provide free shipping) and reimburse the shipment costs toward the customer as well, but I've only encountered very few that do.
While I would be completely in my right to try to undo this order and have €7.90 returned because I got a product that does not meet my expectations / has wrong specifications, it's not enough money to be worth it. It's not worth the time and energy.