Deluxe prototype board assortment consists of 3 popular prototype boards, each is made out of 0.06" thick glass epoxy. Each board has a quantity of pre-drilled copper pads on 0.1" centers. The smallest is about 2.0" x 2.5" and the largest is about 3.5" x 4.5". (sizes and patterns may vary slightly from picture). A $17 value.