Eva Longoria has admitted packing on a few extra pounds lately but insists she's still "a size zero.”

How does that work, exactly?

The actress has fended off persistant pregnancy rumours over the past few months after gaining weight for her role as the newly-dowdy Gabriella on Desperate Housewives.

But, despite the extra curves, Eva reckons she's stayed the same weight.

She tells the new issue of Allure, "I never went up a size! I just got rounder. I'm still a size zero."

Eva has 'ballooned' from a size zero (left) to a size zero (right)

The star also took the opportunity to once-again deny that she and husband Tony Parker are expecting a new addition to their family.

"I know I'm not pregnant," she tells the magazine.