Bidding box for home-played games. Use of bidding boxes has several advantages over oral bidding: it reduces noise in the room, prevents bidding being overheard at neighboring tables, allows easier review of the auction, and reduces the opportunity to pass unauthorized information to one's partner (intentionally or not) by the manner and intonation in which one makes one's bid. A bidding box is typically a plastic box with two slots, each containing a set of bidding cards. One slot contains 35 cards with symbols of bids (5 denominations—clubs (), diamonds (), hearts (), spades (), and notrump (NT)—in seven levels of bidding,
Bidding box order of placing the cards would be from right to left. Some manufacturers offer bidding boxes for left-handed people, which are constructed (except for the placement of suit symbols on the tabs) and used as mirror images of right-handed boxes. Tournament organizers generally permit the players to carry their own left-handed bidding boxes. The card symbols are orange for the diamond pips and green for the club pips, whereas the spade and heart pips are the customary black and red. Bidding box A bidding box is a device used for bidding in bridge, usually in duplicate bridge competitions. Made in