Awwwwe! Sweetie! You are gorgeous, and NOTHING can make you look fat!

Maybe you could request something a little on the longer side, or maybe bigger, in case you think it's not the best fit, but not because it's unattractive.

I agree with Edwina on changing colors though. Maybe you could ask your servants to get you a cushy liner for your box? Or paint the outside of it, I mean if you really hate the thought of getting rid of or replacing it.