Here is a link for a juicy carrier on ebay that looks just like that one in black...maybe it will help you decide. It has the dimensions listed.
AUTHENTIC Juicy Couture Black Velour Pet Carrier - NWT - eBay (item 220244731928 end time Jun-17-08 06:34:50 PDT)
I have a juicy carrier for Ralphie and I just can't tell you how much I LOVE it!!