One way to make your new room feel more spacious is to wallpaper it with a light or pale color. This will reflect more light and make the room appear brighter and larger. You could also consider using a striped or textured wallpaper which will also add visual interest and depth to the room. Whatever you do, avoid using dark colors on your walls as these can make a small room feel even smaller.
If your new room is smaller than your previous room, you may want to consider using a wallpaper that will make the room look larger. There are a number of different wallpaper designs that can help to accomplish this goal. For example, using a vertical stripe pattern on your walls can help to create an optical illusion and make the room appear taller and wider.Alternatively, you could use a wallpaper with a large floral or abstract design which will also help to make the room look bigger. By using these types of designs, you can help to trick the eye into seeing more space in your small room.