I just use two of the 24 X 35 inch matts butted up side by side....if you make sure that they are butted up, I don't have any problems cutting across them....they fit on my 6 foot table nicely. The only time I use both of them is when I trim the edges off of a quilt when I take it off the long arm....and I really don't even need it then as my arms are not that long when making a cut....the 6 foot table just helps to keep most of the quilt on the table.....I will sometimes use both ends when cutting backings to size....but often I just fold the fabric so everything fits on the table and cut through multiple layers....I don't really see the advantage of a huge mat.