These planter boxes are made from Douglas Fir and are 12 inches tall, 24 inches wide. The longer one is 4 feet in length and the other is 3 feet in length.
The four earring case is made from purpleheart and maple. Dimensions are 4 1/4 inches wide, 2 1/2 inches tall and 2 inches deep.
The miter spline jig holds boxes and the like in place while cutting the slot for later insertion of the spline. miters joints are notoriously weak joints and a spline will greatly enhance its strength.
This jig was presented on King’s Fine Woodworking as a video and I bought the plans from their website.