This item was given to me by an acquaintance, and it's unused. I haven't used it even once since receiving it. I don't know the material. The inside is a shiny red color. Width: Approximately 24cm Height: Approximately 12.5cm Depth: Approximately 4.5cm There is one pocket inside. The pocket is 8x13cm. It will be sent in a dedicated box via anonymous delivery service (Takkyubin).