I'm 22.5cm and the size 5 i got is a perfect fit. I haven't used it yet but i tested the pair. They're comfy and looks expnsive. Not slippery and light. I think they are perfect for casual outfits and may also be used for driving. I'm already eyeing for another pair from Oak. Thanks!
Order a bigger size, but their return policy is very convenient. Love the feels of this pair!
The shoes are comfortable and feel stable. I'm normally a 5.5 shoe size but a size 5 seem to fit just right. My feet are a little wide but they fit without pinching my toes. They were a little lighter than expected but seem ok. I plan to buy another pair from OAK, -- maybe two more.
By the way, the discount codes after a purchase should not be given only when I submit a review.