This is a LEGO Harry Potter Advent Calendar with 335 pieces. It features various characters and is part of the Seasonal/Christmas subtheme. The set number is 75981 and it was released in 2020. It is now retired and was last available for purchase in March 2021. The calendar measures 15.67 inches in length, 11.02 inches in height, and 9.02 inches in width. It is made of plastic and comes in a box.