Garden Treasures 23.75-in W x 6-in H Sage Plastic Contemporary/Modern Indoor/Outdoor Window Box in the Pots & Planters department at Lowes.com
TRIANU 3 Pack Rectangle Planters for Indoor Plants, Large Vegetable Flower Herb Window Boxes, Plastic Growing Pots with Tray for House Windowsill Balcony Garden, White - Walmart.com
Amazon.com : 10Pcs Plastic Window Boxes Planters, Black Rectangle Flower Boxes, 16.6 x 6.7 x 5.5 inch Window Planter Boxes Outdoor with Drainage Holes and Trays, Sill Planter Box for Sill, Garden,