They can have no drainage holes or multiple drainage holes.
They grow in full sun, part sun or filtered shade, sun/shade mix, or full sun to part shade.
Heights range roughly from about 30 in up to 66 in and widths from about 8 in up to 15 in (examples: 48 in h x 14 in w; 66 in h x 15 in w).
They come in double ball or triple ball configurations.
They are made from resin, poly-resin, or metal.