This is an original watercolor of Sienna, Italy houses. It is sized to frame either at 18X24, or the mat can be wider if you frame it in a standard-sized 22x28 frame.
There is texture in the painting that is lost in the online image.
View 2 shows it matted in black for 20x27 metal frame (which you can buy off the shelf). Black mats are for bold people that love color.
View 1 shows the painting unmatted. A white mat looks great on this painting, without quite as much color as the black mat pops the colors.
Giclees are a wonderful way for more people to enjoy the same art. They use archival ink on archival paper or canvas, and when placed side by side, it's virtually impossible to tell which is the original. They are shipped without a mat.