High-quality genuine leather, half-moon Saga Nishiki zori (sandals), gold, floral pattern obi (sash), for Japanese attire, size S

My mother purchased these new on Mercari and only tried them on once indoors. She is selling them because the size didn't fit. The product title is based on the original listing information.

I'm not very knowledgeable, so please feel free to ask if you'd like me to add more photos or measure the size.
I've included a photo of the size measured by a layman with a measuring tape.
I measured from the tip of the toe to the edge of the heel with a soft measuring tape, and it was 22cm.