The cable railing dimensions, particularly for a cable wire stair railing, depend on several factors including building codes, the specific design of the stair or deck, and the aesthetic preferences of the homeowner. Typically, the spacing between cable wires and the height of the railing itself must comply with local building codes to ensure safety. For cable wire stair railing, the standard height for residential railings is often around 36 inches from the stair nosing to the top of the rail, with cable spacing designed to prevent a 4-inch sphere from passing through, ensuring safety for all users. The diameter of the cable wire usually ranges from 1/8 inch to 3/16 inch, providing a balance between visibility and strength. However, it’s crucial to consult with us to determine the precise dimensions and requirements for your specific project.