It has been discussed at length here. Most people would tell you to use the search function.
4x8 with 5.5" pockets
If you had used the search function, you would also know that it is unlikely that the pockets were that large. Fact is, no one knows for sure just what size they were. But, the general consensus is that they were just normal size pockets.
You and others might find this an interesting read- http://forums.azbilliards.com/showthread.php?t=55755