They have paulownia wooden soles. These traditional Japanese shoes are the equivalent of European clogs.
Healthy for the feet and very comfortable to wear in the summer.
Traditionally, these getas are not worn tight: your heel may protrude a bit at the back (usually up to 2cm).
M: 26.5cm of base =size: 39 to 42 L: 27.5cm of base =size: 42 to 44