Sissy has pretty much been the same size since about 10 months. She has put on about 1/2 pound sicne then but that hasn't changed her size at all. There are lots of places on YT that sell great stuff.
My personal favorites are;
www.go.fetch.home.comcast.net,
www.tinkerbellscloset.com,
www.chloebella.com, and
www.kristonskreations.com