I wanted to get input from the collective brain regarding the dimension of a tray ceiling in the master bedroom. The room dimension is 16'-10.5" by 18'- 10.25" . There are two open entryways into a large walk in closet that each measure 3'-10.75" that are found along the short wall. The ceilings in the house are 10'. I plan on the master bedroom ceiling to start at 8'-9" and move up to 10'. This house is a modern rancher with clean lines and minimal fuss. The tray ceiling will house cove lighting (no recessed cans in this ceiling) and will only have 1 tray. Any suggestions for tray width and depth? My initial thought was to make the tray width a total of 30% of the ceiling width (so 15% of room width would be 30.37")making the width of the tray 30 inches. The depth would be half the height (15inch depth). Does that math sound reasonable to anyone else? Thanks in advance for the input.