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The stair treads can also be ordered with a matching 3' x 5' or other size landing mat. For stair treads ranging anywhere from 24 inches wide to 36 inches wideor other custom sizes, turn to Dean Flooring Company.
Agreed that 42 wide stairs is a good width and is pretty common. If you want a more deluxe feel, go up to 48. Be aware though, certain building codes about railing requirements for wider stairs. Riser height is comfortable at around 7.5. Some prefer a lower rise as mentioned above.