We have different styles of interior risers as shown below
If you are not sure which style you need provide us with a photo of your interior steps so we can help you.
These risers typically use two sided VHB tape to adhere.
Style A is most common, the top edge will typically be tucked under the existing rubber step tread or be under an overhang.
For this style we simply need the height and length of the panel you need
Style B is typically used on carpeted risers or when the top edge of style A would be too exposed.
For this style we need the height and width of the face you are covering and the length of the top flange (1/2″ is typical)
Style C is typically used on the face of the sliding floor that covers the interior stairs on some coaches.
For this style we need the height and width of the face you are covering and the length of the top and bottom flanges (1/2″ is typical) Also note if you need a slight bend in the middle to help fit over carpeted areas.