Kaplan Knob Puzzle Case Great for classrooms or play rooms! Solid wood case holds 8 of our large knob puzzles Measures 14 1/4"H x 13 1/2"W x 12 1/4"D Solid wood case holds 8 of our large knob puzzles Greenguard product-indoor air quality certified This specially-designed, solid wood case holds 8 of our large knob puzzles. Measures: 14 1/4&#034;H x 15.5&#034;W x 12.25&#034;D.