Dimension: Diagonal app. 20cm/30cm/40cm(According to your choose),Hexagon shape. Professional tarpaulins technology, cotton canvas frame, fine lines, can be directly painted. Frame using the international common structural design, stability, and can withstand the test of time The canvas surface is covered with a layer of film,can better prevent the canvas from sticking together,prevent dust from damaging the canvas surface. Great for artworks, painting, crafts, students and professionals, home decoration.a great gift for artworks, painting, crafts, students and kids.