45 MM X 68 MM. This is one of the most popular card sizes for euro board games, the Mini Euro Size. This size of 6.8 CM by 4.5 CM is the "standard" among most euro games that use smaller cards. Any game that has a card width of 4.1 CM to 4.5 CM would fit well into these sleeves as long as the height is 6.8 CM or shorter. You can always trim a bit off the top if you need to.