About 49 1/2, Needs to be cleaned. I think it is porcelain not sure. The item “Antique Vintage Pennsylvania Railroad Truc Train Advertising Porcelaln Sign 49″ is in sale since Tuesday, April 23, 2019. This item is in the category “Collectibles\Transportation\Railroadiana & Trains\Signs & Plaques”. The seller is “foofoo52″ and is located in Greencastle, Indiana. This item can’t be shipped, the buyer must pick up the item.