Adult Abyssinian cats generally reach full adulthood weight by their first year. The weight range varies largely on genetics and diet. In terms of gender, you will find that male Abyssinian cats weigh about as much in adulthood as the females. It is also interesting to note that the weight range for Abyssinian males and females isn’t all that big either. Both males and females have an acceptable breed range of 8 to 12 pounds.