The panels are nice and stiff, even when using multiple layers of acrylic paint. They are square and the sides are straight. The individual wrapping is a nice touch. The texture is standard medium canvas weave. They are a hair shy of 9 x 12 in both dimensions, but not so much that it interferes with framing so far. I would have no problem using them for saleable artwork, except for the huge logo and manufacturer information on the back of every panel. (In the photos, I thought it was just a label on the outer package). It looks like a huge ad and very unprofessional. Because of this, I will probably not purchase again, and opt instead for a brand with no or unobtrusive branding on the back. For those who use these only for their own personal artwork, these panels are a good choice.