This is a LEGO Blue Project Case with a 10x10 Green Baseplate, measuring 12 5/16 inches in length and 13 inches in width. It was manufactured in 2013 and is compatible with LEGO Harry Potter Advent Calendar and LEGO Star Wars Advent Calendar. The container is made of plastic and is suitable for storage and display purposes. It also comes with a baseplate and is designed for LEGO enthusiasts aged 5 and above. This item is a perfect addition to your LEGO collection and is ideal for keeping your bricks organized and secure.