Hi, did you mean to attach a photo?

Hi Sue, I think it would look amazing if you used some tiles with a bit of texture. The wood look tiles that are popular at the moment would be an example. If you chose a colour that toned in with your floor you would get a really nice cohesive look but with a bit of interest. I've attached a photo of a recent design of mine as an example. Just a suggestion!

Two issues -- The middle size looks 'about right' and approx 40cm diameter ( approx 2/3rds the size of the larger one ) . But I don't think it suits many modern styles -- a beach inspired place with say white woven wallpaper or seagrass style flooring or some distressed furniture would be complemented by this , but a modern build with say painted walls doesn't do anything with this style IMO . Go classier rather than laid-back would be my advice , and that would depend on the decor . And thinking about things , one 'trick' I used in a commercial building I own was 5 polished copper shades up an L shaped stairway -- the ceiling was flat , so nearly 5 metres 'up' at the base , and I used 28cm ones with the biggest round clear LED bulbs ( 8Watt ) I could get , all hung on that oldstyle '1940's iron' type cord , so they were all 2.6metres above the stair below -- it created that 'going up' visual effect . One large light ( especially say 4 metres above the deck ) won't give that effect .

You could keep a picture there and add a second large portrait shape piece to left, or have a large wide piece to left, replacing current pic with a tall lamp or other item on dresser in corner to balance. Or just a slightly large where is leaving rest of wall clear noting it looks a narrow walkway