There are only five possible accurate descriptive words for them (again, except for the skinnier one on the left).
Two are descriptive relative to average body sizes: ‘big’ or ‘large’. These are very mild, gentle terms.
Two other terms are ‘overweight’ or ‘obese’, which are medical / scientific terms, devoid of moral judgment, purely based on body mass index and health / physical fitness considerations.
You know the other term; we all do, as do they, though they don’t want to admit it to themselves or others. 🙂
One can’t escape human nature, as much as progs would like to in some cases (while not in others).
Men will find attractive what they find attractive, and find unattractive what they find unattractive, and men and women alike will judge both men and women on their weight.
And regardless of what term one uses, fat is fat.