I just bought some glass tiles with size 1-1/4" x 7/8" /3.2 x 2.2 cm from Sun and Moon Craft. They are really beautiful with smooth edges.
It is a bit wider than the rectangle that I have. The Sisters Version II just fits it nicely.
I'll introduce others paintings that are suitable for the size of glass tiles.
Lily Pang Art
Lily Pang Art and Design, Gardening, Painting