8.25 x 3.75 inches. Finished with Seal a Cell, Beall buffing, Doctor's wax/oil. Not sure what species of oak - my brother in law thought it might be blue oak. This was a tree on my in-laws' property in the Sierra foothills. After they died, it was brought down for fire safety. I gave this bowl to my grown son, so it will stay in the family where it belongs.