This rather nice looking puzzle box with nine squares on the lid faintly resembles a "tic-tac-toe" board. This is no "tic-tac-toe" game: it's another "sliding panel" puzzle box, and the sliding panels in this case are the nine squares on the lid, and they all have to be moved around to take the lid off. Twenty moves are required to open the lid. The only moving parts are in the lid, and they are very precise pieces. The rest of it is just an ordinary box. This box is made from 1/8" birch plywood.
Outside dimensions: 6" length, 6" width, 3 1/8" depth
Inside dimensions: 5 1/4" length, 5 1/4" width, 2 1/4" depth