Thank you. I've been studying composition and lighting a lot recently. The size of the canvas is 9 by 12 inches.
Thank you for the comments. I'm not sure if the glass jar is leaning or if I had my camera at an angle when I took the photo...
You are right it may be better to blend those yarn shapes into the background...
Thank you all for the nice comments. The medium is actually acrylic on a cotton canvas.
I took a better quality photo with my camera recently: