The title is made up of 'square format' and 'aquarelle', the French and German word for special watercolor paints; it might remind some of a landscape with water...
The colors in the original are so much clearer and brighter.
The paper is strong; flat it will travel well in a cardboard box.
A natural white matt 40x40cm or even 50x50cm looks great around it, but as always, it depends on the frame you like. I can give recommendations.
aquarell / watercolors on 300 g/m structured paper