Snowman Large Felt Christmas Tree Hanging Advent Calendars. This quality felt Christmas advent calendar has 24 pockets to fill with treats on the countdown to Christmas. 2 Styles to choose from. Red Felt Santa or White Felt Snowman in the shape of a Christmas Tree. Dimensions when in use: Length 63cm, Width 37cm, Depth 1cm. Hanging length including ribbon: 73cm. Size of advent pockets: 5cm x 5xm.