Black infant bodysuits, commonly called Onesies after the Gerber brand that first made them, are available at a number of online and in-store retailers. Amazon, Old Navy and Hobby Lobby all have black infant bodysuits available. As of 2014, Gerber Onsies brand does not sell a solid, all black version.
Black infant bodysuits can be purchased individually, or they may be purchased in multi-packs that feature a variety of colors. Carters brand often has four packs of bodysuits in solid colors. Black bodysuits are frequently found in packs marketed towards boys. Dillards, Target, and American Apparel are retailers that sell black bodysuits.