Wood Box Planter Centerpiece Square (Half Foam) Natural Color + Plastic Liner + Foam 3.5x5.5x5.5 Our Half Foam Box is 5.5x5.5 and perfect for that small arrangement, plant, or craft project. It is sturdy, well crafted, and hand-made in the USA. Each box is crafted with attention to detail and quality. They are available in natural or in a dark wood stain, and you can purchase plain, with plastic liner, or the complete package with foam included.