We have added a higher 4 step pet stairs to our line to accommodate small dogs and higher mattresses. The rise on each step is 6 inches, making it easier for small dogs, or older cats to climb up to your bed with ease. The depth of each step is 7 inches. When measuring be sure to include 5 to 6 inches inches from top step to top of bed, unless you want the top step even with the top of your bed. These steps measure 24 inches high x 26 inches long x 16 inches wide.