I've never had an overweight pet, and my current cat is no exception.
That's what they say about the breed I have.
The average male cat weighs between 15 and 25 pounds (6.8 and 11.34 kg), and female typically weigh about 10% less than males – around 10-15 pounds (4.54-6.8 kg).
She falls within the average range, so she's in a healthy weight.