13.5x0.75x19 in. Shelf Kit for 15x21 in. Vanity Cabinet in Light Wood GrainThis full depth adjustable shelf kit from Home Decorators Collection includes a 3 4 in. thick shelf panel and 4 clear plastic locking shelf rests. The shelf is sized to fit a 15 in. wide x 21 in. deep Home Decorators Collection vanity base cabinet. Made with CARB compliant furniture grade plywood for your peace of mind. 3 4 in. plywood construction with light wood grain print finish for strength and durability Sized to fit 15 in. wide x 21 in. deep