This jersey is up on eBay as a game worn item. While it has been worn, I don't think Patrick Ewing was the wearer.
For the beginnings, There is no apparent extra length on this jersey, and Ewing normally takes 6 nches of extra length on his shirts.

Also, NBA-issued Knicks jerseys have the Starter tag affixed to the white front of the jersey, not the colored side panels.

Fortunately...the bids reflect these inconsistencies...so far, anyway.
Dave Miedema
For the beginnings, There is no apparent extra length on this jersey, and Ewing normally takes 6 nches of extra length on his shirts.

Also, NBA-issued Knicks jerseys have the Starter tag affixed to the white front of the jersey, not the colored side panels.

Fortunately...the bids reflect these inconsistencies...so far, anyway.
Dave Miedema