Bidding box

A bidding box is a device used for bidding in bridge, usually in duplicate bridge competitions. Made in various configurations and sizes, it is typically a plastic, wooden, or cardboard box with two holding slots, each containing a set of bidding cards. One holder contains 35 cards with symbols of bids (5 denominations—clubs (♣), diamonds (♦), hearts (♥), spades (♠), and notrump (NT)—in seven levels of bidding, numbered 1-7). The 35 bid cards are cut with tabs (as in a rolodex) and arranged in a staggered fashion so that any desired bid can be easily removed and placed on the table.