21cm 21 centimeters I bought these here but never used them, and they've become too small. These are beautiful items, used only once. The name section has been marked out with a marker. When shipping, I will make sure the thickness is within 3cm. These are items stored at home by a private seller. Although they have been worn only a few times, please understand that they are USED, and that they will be packed to be within 3cm thick. Instant purchase OK!