Shelves comes with 6, 4" holes designed to hold most 4" starter plant pots. Removable center sink bin is 5" deep, 10" wide, and 13" long. GENERAL INFORMATION/DISCLAIMERS: -Wood is a natural material. Variations in color, knots, texture and grain may occur. -This product is made with Baltic Birch Plywood- a decorative hardwood plywood with a veneer core. -This product is both TSCA VI and CARB II compliant. -This product is manufactured in Las Vegas, NV. -This product comes pre-sanded. All products are wiped down prior to packaging, however, some wood dust may be present upon opening. -This wood product is untreated. It can easily be stained or painted once assembled. -Given that the wood is untreated, excessive exposure to the sun and/or water and other liquids may cause warping and/or staining over time. We suggest sealing your product if you plan to use it outdoors or around water/liquids.