Our bestselling Cornerstone is a collection of upholstery that allows you to create chairs, sofas, and sectionals in the style you want, in the size you need with all the options you may desire. All Cornerstone frames, which are listed as LTD7600, come in a standard depth of 36", 38", or 40". You have your choice of frame configurations, 3 different depths, 15 arm styles and 29 base styles.