The striped wallpaper on the Ricardo’s Hollywood set may have been vertical stripes that were applied horizontally. The red arrow indicates a possible join which appears on both sides of the set at the same height making a wider center band across the middle of the wall – at around shoulder height to the bell boy as he enters the door.

Here is an alternative view – the picture is rotated 90 degrees. This is a look that is easily created using a similar vertical striped wallpaper or even fabric for a mid century themed room.