A fantastic new way to display your orchids in a 'natural' setting! These planters are made of heavy duty polystyrene foam, grooved and spray-painted to appear like natural birch logs.Horizontal Birch Logs (feature two rubber-stoppered drainage holes in the base) Medium Horizontal: approximately 5.5" x 9.25" apertures; 6" tapered depth Large Horizontal: approximately 7" x 13.5" apertures; 7.5" tapered depthVertical Birch Logs (feature a single rubber-stoppered drainage hole in the base) Small Vertical: approximately 4.5" aperture diameter; 4.75" depth Medium Vertical: approximately 6.75" aperture diameter; 6.75" depth Large Vertical: approximately 8.5" aperture diameter; 7.5" depth