The research aimed at estimating the optimum size of autumn potato farms in Al-Qusir district-Homs province. A simple randomized sample of 192 farmers has been taken from five different villages. The sampled farms were divided into four classes based on size. The results showed that the production, return, net return and the net profit of 1 SYP/ Donnum were increased along with size of the farm .By using one way Anova, The analysis showed that there were statistically significant differences among the size of farms based on the above-mentioned measures.