Capacity varies by model. Examples include racks that hold up to 44 tiles and others that hold up to 28 dominoes horizontally (or about 26 when staggered).
The racks use four 0.5‑inch slots and are designed for professional‑size tiles measuring 2 × 1 × 0.4 inches.
Each rack has four anti‑slip pads on the bottom to reduce sliding and help protect the table surface from scratches.
Some models include a 0.125‑inch slit for holding playing cards and list a capacity of around 20 cards.
The racks are designed with four rows/slots (four 0.5‑inch rows) for organizing dominoes.