The dimensions of a Yu-Gi-Oh Duelist card are 59 by 86 millimeters. In inches, the dimensions are 3.25 by 2.25, and the cards are 8.6 by 5.9 centimeters.
Yu-Gi-Oh is a Japanese manga series written and illustrated by Kazuki Takahashi and published in the weekly magazine "Shonen Jump." The manga follows a boy named Yugi Mutou, who solves a mysterious object called the Millennium Puzzle. In doing so, he awakens an alter-ego that helps him succeed against his opponents in the card game. The Duelist card game is a replica of the card game mentioned in the manga. Yu-Gi-Oh Duelist cards were first printed in 1996 by the Japanese entertainment company Konami.