She's as delicate as a ___?

A female internet friend wrote: ” But I’m ‘delicate’! (You should see me try to get THAT past Hubby!)” She was being facetious.

I’m looking for a humorous comeback that is family friendly. She’s in her forties, 4’11’’, and a dental assistant. From what I know about her, she’s anything but delicate.

Something along the line of: ‘Yeah right, you’re as delicate as a ____’.

Thanks, I’m really drawing a blank on this one.