Count down to your favourite holidays, or any special occasion, with the Marvel 24-Day Bitty POP! 24-Day Calendar. Open the tiny doors to reveal 10 Bitty POP! collectibles, 7 stackable display pieces, 3 festive accessories, 2 keychain cases and 2 pin cases. Expand your superhero collection with this Marvel 24-Day Bitty POP! 24-Day Countdown Calendar, the next addition to your collection. Bitty POP! collectibles come in hard acrylic cases with removable bottom lids - the removable bottom lids serve as the acrylic base, to which the Bitty POP! collectibles attach. The vinyl pieces are approximately 2.3 cm tall. Acrylic key ring cases and acrylic pin cases measure approximately 3.3 cm wide x 4.1 cm high x 3 cm deep (1.3 in. wide x 1.6 in. high x 1.2 in. deep) and fit all standard Bitty POP! cases. The Bitty POP! key ring is approximately 7.6 cm long.