Rosie Huntington-Whiteley is SO thin that her hand appears to be wider than her thigh.
The skinny model uploaded a picture of her manicure on to Instagram, revealing her hand placed over her thigh to show off her new orange nails.
And while we did spend a few seconds looking at her perfectly-polished talons, we were suddenly sidetracked by just how TINY her thigh looks.
The 25-year-old, who is believed to weigh just over seven stone, is a UK size 6 and apparently has a 24-inch waist.
And the tiny model has JUST revealed her biggest diet secret - water.
Rosie tweeted a copy of her latest diet inspiration - a book called 'Dr Batmanghelidj's You're Not Sick, You're Thirsty', which apparently credits water as a way of staying slim and healthy.
Getting overly enthusiastic with her hashtags, Rosie tweeted: "A brilliant book I'm reading. We always knew water was good for us.
"Now discover why. Have you had your 8 glasses today??! #naturesmedicine #getdrinking #8aday #water #simple #safe #free #effective. [sic]!"
So just in case you didn't catch that, to have thighs as thin as Rosie's, just drink eight glasses of water a day! It's that simple!
We're unamused by this claim.
[ Related article: Thin Nicole Richie shows off her skinny frame as she continues to lose weight ]
[ Related article: Josie Gibson admits that she's terrified of gaining weight after her amazing diet results ]
Pagination
Top stories on omg!
Today on Yahoo!
1 - 8 of 28

![Skinny Rosie Huntington-Whiteley's hand on her thigh showed just how thin she is. Copyright [Instagram]](http://l1.yimg.com/bt/api/res/1.2/tGErsSkDZSIvxXDjsMjLuA--/YXBwaWQ9eW5ld3M7cT04NTt3PTYzMA--/http://l.yimg.com/os/publish-images/omg/2013-03-14/66d09f47-7da6-4af9-8703-592fc78d05a5_rosie-huntington-whiteley-skinny-thin-weight-diet-size.jpg)
![Rosie Huntington-Whiteley apparently weighs just over seven stone, which she credits to a water diet. Copyright [Splash]](http://l.yimg.com/bt/api/res/1.2/yxhjNqbQALem0L8F2nBdEA--/YXBwaWQ9eW5ld3M7cT04NTt3PTYzMA--/http://l.yimg.com/os/publish-images/omg/2013-03-14/33ab71d3-4d9d-435a-b87b-296ee5ed5830_rosie-huntington-whiteley-skinny-weight-size-legs-hands-thighs-diet-water.jpg)









