My hubby got me the vera bradley carrier for my birthday in Sept. Tank is about 6lbs and he fits in it comfortably. I like it because it has a secure turn lock at the top of the mesh. I have had ones with zippers before and tank wiggles his nose through them. I don't have any pictures of him in it with me, but here's their website and a picture from it. Goodluck finding one you love!
http://www.verabradley.com/Site/Stor...&sku=812%3a60&