Dayn Schulert 3 I bought the large size marked for 27.5~29.8cm for a pair of 28cm boots. The bootkeepers were far too small. They simply sit in the boots applying no pressure/stretch at all. Considering they are supposed to be okay for shoes up to about 30cm, this is very disappointing.Either buy a properly sized, more expensive bootkeeper or just buy any of the other shoekeepers here on Amazon. Whatever you do though, don't bother with these. They are a waste of money.