Straight from the Marco site:

Glass playfield 23.75" x 43" x 3/16 wide
#08-7028-1
Playfield glass for Wide Body pinball machine measures 23-3/4" x 43" x 3/16" thick tempered.




Glass playfield 21" x 43" x 3/16" std.
#660-5001-00

2 for $99 Special!

Standard pinball cabinet tempered PLAYFIELD GLASS measures 21" x 43" x 3/16" thick and is used on most manufacturers pinball machines.