This is the largest piece I've done completely plein air (outdoors) to date (24x30 inches). I love how it turned out.
I had a number of consecutive days available with fantastic weather projections, so I took it upon myself to try to work a large piece.
I have a blog entry describing the creation of this piece, which you can find here: http://timonsloane.com/blog/painting-large-format-plein-air-outdoors
This is oil on cradled masonite board (half-inch deep cradle). I can be hung as-is, or framed if you prefer. It is currently priced as available unframed. An image of it framed is included for reference. The framed price is $3200.
Various sized custom reproductions of this piece can be ordered here: http://fineartamerica.com/featured/warm-winter-timon-sloane.html