Size of this layout

What is the size of this layout? http://trains.com/mrr/default.aspx?c=a&id=1796

Big…[swg]

It looks like it’s 36’x18’6". The minimum radius for the balloon track is 32" so it is 64" wide and coversjust over 2 and a half squares leading me to think that the layout is drawn on the 2’ grid often used by MR. Then it’s just a simple matter of counting squares by two’s to get the measurements.