Review on LWR Crafts Mini Stretched Canvas by Gelin Battle

This is the advertised size but there is nothing 'stretched' about these canvases. I haven't started painting them yet. They have marks from upside down packaging where the staples on the back are rubbing against the canvas it's sitting on. (Any manufacturer who knows their supplies packs them end-to-end to avoid this.) In addition, 25% of the canvases are not glued properly and the canvas is wavy on the wood, and none of them are stretched. They are also very chalky for some reason I can't figure out. Personally I can live with that and for easy projects with kids it shouldn't be a big deal but if you do