If you find yourself in Barcelona, you must (let me repeat, *must*) visit Kokua, a shop that sells only ballerina flats.
“Only” doesn’t do this shop justice. It sells every type of comfortable ballerinas you could imagine: from low key and classic to attention-getting works of art.
The clincher for me was that the shop is family owned (at least according to its website…which looks like it hasn’t been updated for a while, unfortunately). Try your luck getting in touch on their Facebook page. I’m not sure if they sell online, but it’s worth a shot.
I walked out with the fabulous ruby-red glitter covered darlings at the top for EUR 70. Nothing happened when I clicked my heels three times though.
Where’s Glenda the Good Witch when I need her?
Carrer de la Boqueria, 30 (Ciutat Vella off of La Rambla)
(The address above is the main store. There’s another branch very near it, but I think it’s for stock overflow.)