I don't know why some people aren't getting the wallpaper when they click and some are. I don't even use an adblocker and it works for me. I'm stumped. It just links to the wallpaper site. http://www.widedesktopwallpapers.net/flowers/images/heuchera_plants.jpg

So how do we know that the drop match is 27 inches? How long is your bathroom. How wide is your bathroom? Did you arrive at the 27 feet by adding the four walls? If so, then multiplying by the 8-ft ceiling is correct. JMHO, but whoever wants to sell you 7 double rolls is wanting to sell more and whomever told you 3-1/2 double rolls (or 7 single rolls) is probably wrong. I think 5 double rolls is about right. Each wallpaper bolt (2 single rolls in most cases, 3 in very odd cases) will tell you what area in square feet it covers. Now if you have tile on the walls, you can subtract for that. If you have doors, windows, you can subtract for that. I just did a friend's 240 square ft bathroom using 5 double rolls and she had a 23-inch repeat. We had paper left over, about 1 double roll. Another factor is the paperhanger. Some will try to save your paper, whereas others will cut one length at a time and not care about wasting it. Good paperhangers, all, does not matter, will waste or save. I am going to say your wallpaper store probably is the most correct. Most companies encourage you to buy more for waste as sometimes, even experienced paper hangers will measure wrong, cut wrong, etc., and then if you have to order more paper, there is that chance the dye lots will not match.

http://www.estahome.nl/en/wallpaper-palm-leaves-mint-green-139005.html Maybe? Ah found it https://www.inspiry.co.nz/shop/SERENADE+COLLECTION/KHR%D4MA+PREMIUM+by+MASUREEL/OXYGEN+COLLECTION/OXYGEN+COLLECTION-25.html

I think you should choose a paint color that is scrubbable that relates to the dark teal curtains. Whether it is same dark teal or shade or 2 lighter. If you are adventurous then find a stencil to paint over the accent wall. Like the pictures below I posted. Cutting Edge Stencils . Btw, I recommend returning the curtains and getting the length that is 1/2" above the floor. Or doing a roman shade so that it does not become a pulling hazard when the baby is older. ;) Tend like this one because it gives you that "geometric" structure but softer to play off the rug.