This is a large piece of natural Dried sponge rock that measures approximately 7.5” - 5.5” X 3.5”. It is oval shaped so measurement varies slightly depends how you measure. It is a little over 3 pounds. It is in good condition according to my opinion and it has collected some dust over the years - I will leave it to the new owner to clean it up or display as is. It has no odor. It has not been used only displayed.