Card flat on a plain surface, straight from above, whole card in frame, no sleeve. Then photograph front and back.
Measuring needs a free account so your scans stay with you.
Sign in and check a cardCentering tool: check centering before you send to PSA
Two photos, one result: the tool finds the card in the picture, measures the margins between card edge and print frame on all four sides and turns them into centering percentages, front and back. Plus the highest PSA grade this centering still allows (PSA 10 requires at most 55/45 on the front, 75/25 on the back).
Every line can be dragged with a finger, with loupe and fine adjustment – the tool proposes, you confirm. It does not replace a grade: corners, edges and surface are judged by PSA on the original. But it tells you beforehand whether the centering allows a 10 at all.
In detail: how the centering tool works, with PSA limits and photo tips
