Roma tomatoes are egg or pear-shaped and red when fully ripe. They have few seeds and are a good canning and sauce tomato. Maturing in under three months, the plant itself grows to 1 meter (36 inches) in height and the single fruit weighs about 60 grams (2 oz). The "Roma VF" variant is most common in seed catalogs as of 2007, and was developed by the USDA's Agricultural Research Service scientists in Beltsville, Maryland in the 1950s as a fusarium wilt-resistant cultivar. Smaller plum tomatoes about the size of cherry tomatoes are sometimes sold as "baby Romas". A smaller relative known as "Windowbox Roma" is sold as a tomato suitable for window gardens and hanging containers.