I used this for breakfast for about a year. It's made of plastic and is light and convenient. I bought it at a local general store. 18 x 24 (cm) There are small scratches, which don't show up in the photos. It's more of a beige color than off-white to begin with, so it's not yellowed. I've wiped everything down with alcohol. For reference, I'm also selling a new (different color) off-white one. I bought it at a different store, but it seems to be the same product in a different color. For your reference. Selling separately is also more expensive. Please refrain from purchasing if you are at all concerned, as this is a used item. Shipping alone will cost 750 yen.