I have these: my dog is 7 lb and 9 months old.
Alyson Bag Dog Carrier- Black
It was really roomy when he was 3 pounds but he fit perfect now. He loves to have the side open so his head can be out. The only thing I don't like about this that it is black. I think it is to hot for summer time.
Soft side fashion pet carrier ...from amazon
I love this one because it is really roomy. If we go out to eat, we take this bag so Leo can lay down. I also took it on our first plane trip and he had plenty of room.
If money was no object I would by the LV carrier.
I also like the brighton pet carrier in black and red.
Brighton.Com Shopping
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Make sure when you are shopping that you take your dog with you and give all your carriers a test drive. All carriers are a little different. This is a very important investment and you want to 'love' everything about your new carrier.