EuroGraphics Irises by Vincent van Gogh 1000-Piece Puzzle Box size: 10" x 14" x 2.37". Finished Puzzle Size: 19.25" x 26.5". As were many of Van Gogh's works, Irises were influenced by Japanese ukiyo-e woodblock prints. In 1987 Irises became the most expensive painting ever sold. Strong high-quality puzzle pieces. Made from recycled board and printed with vegetable based ink. This superior quality puzzle will delight and educate all at the same time.