Are there straight edge tile to lay flush against the wall? What is the method to measure the room in order to know how many tiles to order?

Our Tight-Lock Tiles come as corner, border, or center tiles, so yes, you can order tiles that are straight edge cut to fit along walls. When measuring your room, you will want to just take a tape measurer and measure along the walls to get the dimensions of your room. Once you have that, on the product page, we offer a calculator where you can enter the size of the space you are filling, and it will let you know how many tiles it will take to fill the room.