I took a picture of mine with its contents when I did my reveal thread. At the time, lots of Mulberry girls were impressed with the capacity of a small Mabel. The secret, I think, is its big wide base - cute from the front, chunky from the side.
In mine:
Hard plastic cut to the size of the base so it won't sag, covered in Charles Jourdan scarf.
Bag hook inside 100 baht black leather case
Mobile phone
Furla wallet
Lambskin pouch with digital voice recorder, headphones inside
Eau de mer 2009 agenda
Ipod nano inside Furla robin pouch
Pens
Small notebook
Keys including work keys
Packet of Extra chewing gum
Clinique lip gloss
There's room to spare. I could, if I wanted, fit my little digital camera in.