I guess to me an art quilt is an original, non-traditional quilt, that features unique materials, design elements and/or techniques, and may be any size or shape. A bit hard to describe in words, and a bit hard to categorize in terms of the more traditional quilt world. But really, I think there's an art to all types of quilting.
My own art quilts are small in size, ranging anywhere from 15"x19" to 26"x30. The designs are my own creation and they contain many elements that are very non-traditional.
I've posted photographs and some brief information about each. I hope you enjoy them.