Here are some general size ranges:
Height:
* Mature cows: 4-5 feet tall at the shoulder
* Mature bulls: 5-6 feet tall at the shoulder
Weight:
* Mature cows: 1,000-1,500 pounds
* Mature bulls: 1,500-2,500 pounds
Some specific examples:
* Hereford: 1,400-1,800 pounds for bulls, 1,000-1,200 pounds for cows
* Angus: 1,700-2,000 pounds for bulls, 1,200-1,400 pounds for cows
* Brahman: 1,800-2,200 pounds for bulls, 1,200-1,500 pounds for cows
* Charolais: 2,000-2,500 pounds for bulls, 1,400-1,800 pounds for cows
Factors affecting size:
* Breed: Different breeds of cattle have different genetic predispositions for size.
* Age: Cattle continue to grow until they reach maturity, typically around 2-3 years old.
* Sex: Bulls are generally larger than cows.
* Nutrition: Cattle that receive ample nutrition will typically grow larger than those that are undernourished.
Note: These are just general guidelines, and individual cattle can vary significantly in size.