This package includes approximately 25 spin and slide discs. Each disc measures approximately 1/4". Create fun, interactive designs with these handy little devices that provide beautifully smooth movement for slider and spinner cards. Simply sandwich a disc between two small pieces of card stock (created with a Die-namics die that includes a channel,) and adhere your image to one of the pieces to create your design. For slider cards, use 2 or more discs positioned parallel to each other; for spinner cards, use a single disc — the smooth surface of the discs will provide for free movement within the channel.