Inspired by Mr. Okiyama's Twin Box, Kawashima's Twin 4 Box is imaginative and well constructed. This puzzle is one of our all-time favorite Kawashima puzzles! Crafted in Magnolia, Keyaki (Zelkova), and Walnut, it measures 4.37 x 2.36 x 2.36 inches or 111 mm. x 60 mm. x 60 mm. Released in October 2016 was a limited edition puzzle. This particular box has THREE hidden spaces! Will arrive in gift box and opening instructions. *Please note that the picture is a stock photo.