I also don't recommend a single bamboo shade that wide. I had the same issue while looking to cover our 74" wide dining room window. I was told the shade will probably weigh over 20lbs and the lifting cords and mechanisms will wear out pretty quick. Window Blind Outlet sells ready-made sizes up to 74" but they recommended to us that single shades shouldn't exceed 60" in width. Especially if the shade will be opened and closed frequently. Hope this helps. Your kitchen is gorgeous.

I recently shortened several sets in our new rooms, and those directions aren't right for the blinds I used. Mine had threads weaving the bamboo together rather than wires, and little wire 'loops' that directed the cords. What I did (that worked perfectly) was as follows: 1 - First, we hung the blinds, extended them to their full length, and marked where we wanted them to end with a piece of masking tape. 2 - On a large flat surface (I used a bed, covered by a sheet of cardboard), turn the blind over so you're working on the back side. Then, about an inch longer than the finished length, run a bead of hot glue across the threads to keep the blind from unravelling. Make sure you've got good coverage. Cut the extra blinds below the glue line. 3 - Find your desired end length and fold the bottom inch back up to make a hem. Use hot glue to glue up the hem, using 'chip clips' or clothes pins to hold the hem in place. If your blinds are very thin, you may have a better look with a hem rolled around a small dowel, but a simple fold works well for thicker bamboos. 4 - Now for the cords. When pulled up, the blinds folded in certain places by pulling the cords through little metal loops. The loops were spaced every 12" or so, then when raised, those loops stacked one over the other, forming the pleats. Fold your blind (using the loops as guides) to see how the pleats form and where your new lower edge hangs relative to the remaining loops. 5 - Remove a set of loops from your 'scrap' portion of blind, and re-position those loops near the new bottom so it hangs nicely. (If you're totally confused, try a spot 3-4" above the bottom edge -- that'll generally hang behind the other folds and you can always move the loops if your first guess is wrong.) 6 - Then rehang the blinds, raise and lower them, and shorten the pull-cords if needed.

I would think you would need it as wide as your shade. If your shade is 27, than close to a 27" privacy liner. The shades I sell incorporate the liner option, I was unaware that companies sold a separate liner and find it very interesting. I'm curious about the shade functioning with the liner attached without being tacked in at ring sites, interesting, let us know how it works.

No they can't. Relaxed Romans require deeper folds and don't follow the same rules. The only way this could be possible is if you've ordered a very narrow width, but even then you're at the mercy of how the fabric drapes (or doesn't).