it measures 14.25" x 21.5"

Players included are:

Bo Jackson, Roger Clemens, Jom Abbott, Orel Hershiser, Ozzie Smith, Don Mattingly, Kevin Mitchell, Jerome Walton, Kirby Puckett, Daryll Strawberry, Robin Yount, Tony Gwynn, Alan Trammell, Jose Canseco, Greg Swindell, Nolan Ryan, Howard Johnson, Ken Griffey Jr., Will Clark, Ryne Sanberg

Corners are pretty good.  See photos for more details there.   The back is yellowed a bit... again see photos.

Overall it is in great condition considering it is 35 years old.  It has been stored flat all these years and will be shipped flat.  Never rolled.