This depends.
If you ordered an original painting, it could ship within a few days to a week or two. (I want to make sure they are packaged securely so you get your painting in perfect condition!).
Prints are made to order, and can take anywhere from 1-2 weeks (sometimes up to 3 weeks during the print shop's busy season). Once they are shipped, please allow arpimd one week for US orders and around three weeks for delivery for international orders, as sometimes they can get held up in customs.
Holiday seasons can also add extending shipping time.