This is a vintage or antique (exact date unknown) round cast iron griddle. It was made in the USA and is stamped NO.8 HG 9 1/8 IN & MADE IN USA, on the bottom of the griddle.

The handle is about 3.5" making the overall length about 13.75". The griddle is about 9.5". The handle makes it about 1.5" tall. View photos for details.