Bank card vs Golf ball: size comparison
Bank card: 8.56 cm. Golf ball: 4.27 cm. Both silhouettes are drawn at the same scale.
Size ratio: ×2
Bank card
8.56 cm
What is measured Width of an ISO/IEC 7810 ID-1 card
Every bank card in the world is 85.60 × 53.98 mm.
Source : Wikipedia — IEC 7810
Golf ball
4.27 cm
What is measured Minimum regulation diameter of a golf ball
Its dimples cut drag and nearly double the flight distance.
Source : Wikipedia — Golf ball