I purchased these at the Ala Moana store in Hawaii. I only wore them once for a short time to attend a wedding. I usually wear a size 23cm, but they were sold out, so I bought the next size down. I can wear them, but I feel like the width is a bit small, so I'm selling them. The strap around the heel is adjustable, so I think those with narrower feet or who are thin might be able to wear a 23cm size. No returns or exchanges, please. Thank you.