I bought these last year and only used them twice at an indoor gym. The heel didn't feel like a good fit for my foot, so I'm hoping someone else can use them. There's no box, so I'll send them in a box I have on hand. I usually wear 23.5cm shoes. For gym and outdoor bouldering, I wear La Sportiva Miura size 36 or 36.5. For reference. Thank you.