This research aimed to determine the economic scales of production and different product values, and the difference between the true sizes and its parallel economic areas in the midregion of Jordan. The econometrics analysis was used for the cost functions of sheep, goats, and cows production in midregion of Jordan. The data were analyzed by linear regression using suitable economic models. Total production functions of sheep were determined, and the average productivity was derived to determine the economic scales in order to minimize the average productivity cost of sheep, goats and cows. For the sheep, the product value was about JD 16649.59 for 419 sheep, with average cost of one JD is 0.522 JD. Marginal cost function was derived from the total production cost function, with the equality marginal cost function to parallel price in order to reach the scale of maximize profit. The production value was 18251.49 JD for 460 sheep and average JD cost of 0.56. The present productivity scale was 157sheep which was 262 sheep lower than the productivity scales for economic efficiency and 303 sheep lower than that for maximize profit.