Euphemisms to replace “fat”
In French you could say that a woman is plus en chair, plus ronde, which are not necessarily pejorative.
How can I say the same thing in English?
Lindsay Lohan was cuter when she was […].
I’d probably opt for one of the following (and definitely not use the word large – I don’t know any women who’d take that as an unambiguous compliment):
She was cuter when she was curvier (or I liked her better when she had curves)
She was cuter when she had a fuller figure
She was cuter when she had a little meat on her bones (a bit old-fashioned)
Edit: Since people seem to be having difficulty imagining a fuller figure without conjuring up images of Godzilla, here’s a comparative photo of the actual person OP is referencing, before and after she lost weight. I don’t think anyone in their right mind would call the curvier Lohan fat.