She was young and innocent once
This doesn't just include the general dimensions - understanding the size and spacing of font, art, and borders can all help identify a legitimate card, too
The opponent's battlefield layout is identical to one's own except for being mirrored to the far end and, for the graveyard, library, exile, and their companion (pet), additionally being mirrored from the left side to the right side
While not 100% foolproof, this day in age I would just recommend getting a PSA graded example unless you truly want a raw card and know with certainty the auto is real (in person event, a friend of yours you trust, etc.)
Then I skipped the space of two cards on the ribbon and glued down the next
One Piece booster box is not included