This bag was used once but, it is unblemished and appears to be new.  It is a medium length - 19 3/4 inches.  It fit inside of my 56 cm frame although, your fit may vary depending on frame geometry.  I'd suggest going to the web site Tangle Frame Bag - Revelate Designs for more details.  

I no longer am doing the long rides where I need this amount of storage, and it seems silly to have this sitting on the shelf when someone else could use and enjoy this during this riding season.