WE Games Wood Checkers with Stackable Ridge - Red/Black 24 wooden checkers are black and red with approximately 1 in. diameter & cloth bag with drawstring closure included Please measure your board's squares to make sure these will suit your needs. Please note, these are intended for the game of checkers. If you need them for backgammon, please purchase two sets. The checkers are stackable for when they are kinged but are not designed to be interlocking due to the nature of wood. Both pieces must be lifted to move a king from one place to another. The checkers are designed so that if the bottom checker is lifted, the top checker will get a free ride without sliding when handled gently.