Houppelandes were the height of the early to mid 15th Century.  They used a large amount of fabric and were very full, pulled in by a high belt, worn just under the bust.  The sleeves ranged from loose sleeves, to open sleeves that trailed on the floor, often with a dagged edge.

This houppelande, in a Green and Silver Sartor brocade is based on those seen in the late 14th Century Italian manuscript Tacuinium Sanitati.  It has straight sleeves, and a short standing collar.  The neck opening and sleeve ends are edged in Silver Squirrel fur that was repurposed.  This beautiful gown will fit up to a  size 16. 

This gown does not come with a belt, but if you are looking for reproduction pieces, you can find  Belt Ends and  Belt Mounts and more at  Armour and Castings. (opens new tab)   Another good option is  Raymond's Quiet Press.