The listings show two main materials: molded plastic and galvanized steel.
Lengths shown in the listings include about 22 inches, 24 inches, and roughly 30 inches.
Plastic models often list multiple drainage holes, while the galvanized steel boxes typically note a single drainage hole.
Listings describe placement on windows and railings, and one model is listed as ground freestanding.
Many plastic window boxes list no assembly required. The galvanized steel options list adult assembly required but note that no tools are needed.