So, these guys aren't masks, they're wall hangings, but I don't know where else to put them! Masks seemed most appropriate.
On the left we have Wilifred. An aquatic dragon, he spent years in the Caribbean, where he lived in a sunken ship.
On the right, is Snurg, who guarded an abandoned iron mine and smelter.
They're life size, and the only things not leather are the eyes and teeth. I showed them at DragonCon, and they're going to be going with some of my other dragons, to an art gallery showing shortly.