Plano 4-Tier Heavy-Duty Plastic Shelves (White) for $14.97. Select free site-to-store for in-store pickup at Walmart to save on shipping. Otherwise, shipping is $2.97 for a total of $17.94 shipped. Here is a screenshot for your reference. The shelves are made of heavy-duty plastic and assembled by snap-lock with no tools required and measures 14.25″L x 22″W x 48.25″H.