Square 18 Step Ichimatsu/Yosegi/Natural Wood Japanese Puzzle Box This secret puzzle box requires 18 Steps to find the secret compartment. Beautifully crafted Yosegi is crafted to the lid, with Ichiimatsu sides and bottom with a beautiful Wallnut wood on the reverse. Comes with opening diagram and gift box! Outside size : 3.1 x 3.1 x 1.97 inch (80 x 80 x 51 mm) Inside storage space size : 1.6 x 2.5 x 1.3 inch (41 x 63 x 33 mm). Urethane finish.