Here are a couple of smaller paintings I did recently to include in my upcoming show. They are each 12x12" gallery wrapped:
Often times when collectors are interested in my smaller works, they are looking for pairs or multiples to use in a grouping. So I do try to keep that in mind when I am creating the smaller ones-- especially my minis. I don't go about creating "matching sets", but as I am working I think about compliments.
Because there are so many ways to hang art, I created a little sampling of ideas on my website that addresses some of the possibilities. It can really be a fun endeavor in itself, and an expression of one's own personal style and creativity as a collector. Some people like a very formal, symmetrical presentation, while others like to mix it up. Some people prefer that all frames match, but I'm one of those who enjoys an eclectic presentation and think that variety of frame styles presented together can look pretty neat, so long as they compliment each other (and of course the room's decor.) I've even seen both framed and unframed work hanging together to great effect.
While sometimes there is a perfect small spot to display a single painting, these smaller paintings can be shown in so many other ways. They can be stacked one over another on a narrow wall, or presented in groupings over a larger piece of furniture like a sofa or console. They can be used instead of sconces to flank a nice mirror over a buffet or hutch (I've done this in my dining room before). They can even be displayed more informally, and sit atop a mantle or book shelf.
Here are a couple of snapshots from my last open studio that shows how I displayed smaller works as part of a larger grouping: