Once again, you have to click through to the seller site (Barnes & Noble) this time to get more info.
•PRODUCT DETAILS: Material: Bamboo. Dimensions: (L)8.5"x (W)6"x (H)4.75", (H-with handle)9". To clean, hand wash with damp cloth amp; towel dry. Do not let your bamboo item sit in water or remain wet for any length of time. Wash before use.