Knight's Castle - Extension Set - 6 piecesDoes your kiddo have dreams of GIANT castles? This extension set goes perfectly with Bauspiel's Knight's Castle, allowing your little one to build bigger and better. From Germany's Bauspiel. Measurement: 6 pieces, each piece is at least 2. 5cm thick and they range in height from 15 25cm One big wall with archway: 20 x 4. 5 x 14 cm One big wall with window and secret passage: 20 x 4. 5 x 14 cm Two small walls with archway: 10 x 4. 5 x 14 cm Two small