This Dinosaurs Placemat is the only cool way to eat dinner. This 17 inch by 12 inch placemat has 15 different dinosaurs from three different ages on it! It contains dinosaurs from the Triassic period, Jurassic period, and the cretaceous period. Perhaps the coolest function of this placemat is that it is two sided. Study all the dinosaurs on the front, and then flip it over and try and write in all their names! This placemat is made of high quality laminate so a dry-erase marker will wipe off with ease using a wet cloth.