Many jewelry boxes have multiple levels….incorporating one or more trays or other inserts. Often these are supported by additional pieces glued into the box sides to provide a rail, or rail pieces inserted into dados along the sides. I never liked those approaches for many reasons. If the box is made of 3/4″ stock, then at typical dimensions, it is way too “bulky” at the joint between the top and bottom of the box. So then one must plane down the stock, but then turn around and add more in to create the rails. Instead, I cut profiles into the box sides which creates integral rails, thins out the stock for better esthetics at the joint, and results is a very solid construction. In the typical box I shoot for a stock thickness at the top-bottom joint of between 1/2″ and 5/8″ depending upon the overall size of the box. The profiled rails are approximately 1/8″ each. If you are interested in some representative dimensions for profiles on different types of boxes, check the downloadable pdf files in the download section of this blog.