Chessex Reversible Megamat® 1½'' Squares & 1½'' Hexes (34½'' x 48'' Playing Surface)
Reversible Megamat® 1½" Squares & 1½" Hexes (34½" x 48" Playing Surface)
The number of squares on the square side is 22 x 31.
Hexes are 25 x 31/30. The length alternates between 31 and 30 hexes, so no play space is wasted.