you can use size 5" x 7" , 6"x 9" for this couch i am giving you some suggestions of rug i hope you will like it other wise please visit to our website at www.wholesalecarpet.org for these type of rugs and you can design your rug also please mail at midascraft92@gmail.com

I think it is a bit awkward for such a large room. As mentioned, you could fit 2 single beds comfortably, but probably under the windows, end to end. A double would fit but only realistically if one side is pushed against the wall, which is a significant compromise. I think you should definately not have the built-in cupboard, as it restricts your options. Are the dimensions fixed, e.g. are you building above something else? The radiator would be best behind the door as this is dead wall space anyway.

Size of the planks is really up to you, small or large can look great even in small rooms, as for direction you'll want to lay them in a direction that feel right for the room, traditionaly its oblique to where the joists would run. So for the large living room they would run up and down the length of the room (4.371 direction) that would make the room feel longer and be conventional, though you could run the along the shorter length which could make the room feel shorter but cozier.

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