The floor + wall backgrounds always maintain the same proportion, regardless of the background measurements. There are different measures available; you can choose the size you want from the drop-down menu that appears on the product. This backgrounds maintains a 1/3 of floor plus 2/3 of a wall.

For example, if you choose 210 cm in height, you will have 140 cm of wall and 70 cm of floor. And if you choose 300 cm in height, you will have 200 cm of wall and 100 cm of floor. The longest measurement always corresponds to the height and the shortest corresponds to the width of the background.