I have a Titanium Goat bivy I bought about two years ago and used 4 times. I'm 6-2 and it's a tad short when I'm fully inside and zipped up. 'd say it's good for someone 6-0 or under. Here's the link for photos, etc.: http://www.titaniumgoat.com/Bivy.html
Mine has a silver bottom and a dark gray top, not purple. Will let it go for $50 including CONUS shipping.