Bicycle Poker cards are used widely in the world. Some customers like to use the Bicycle marked decks with small marks at four corners. Though these marks are not as big as those big marks, we can mark then very clear to see. And we can clearly know which card it is by seeing the small number and suit at the corner even the players cover most of the cards.

Usually, the sign of the suit is exactly the same as the suit in the poker face.

As that shows in the picture, it's club 6 in the left card and Diamond 9 in the right card.