mytrixie, the 3 xxs shirts are as follows:
blue shirt 4 by 4 1/2" from arm hole to arm hole is 4 1/2"
purple shirt is the same as the blue one
the bunny tails shirt is 4" long and end of arm hole to end is 6"
carrier is 11" tall, 14" long, 7 1/2" wide. dixie is 6 pounds, she can lay in it but with no room, ( i just put her in it to see) lol
so I would say a 5 pound doggie or less would fit real good with room to move
