How well a card's artwork is positioned between its borders, written as a ratio such as 55/45. Off-centre cards may be penalised in grading.
For new players
Raw and graded standards differ: TCGplayer allows up to 70/30 with no impact on condition, PSA 10 needs about 55/45 on the front and 75/25 on the back, and a CGC Pristine 10 is 50/50.