The ones here are all on canvas drop clothes, using acrylic paints. I use several coats of polyurethane over the paint and it makes it look and feel like leather. It's also heavy because a drop cloth is meant to soak up paint and boy howdy does it!
This 3' x 2' and hangs in my entry way
This one is 18" x 18" and hangs at my daughters.....oh wait, I wasn't even finished when I took this picture, it's got more stuff on in now. LOL
This is 5' x 5' and has thousands and thousands of stars that don't really show here. It hangs over sober daughters couch.
And this one I've polyurethaned so many times that I'm using it as a rug, I can sweep and mop it. It's 5'x5' as well.