Use the following R.U.D. Calculator to find the diameter of the shade roll when rolled up completely. For accuracy, be sure your full shading system height is measured from finished floor to top of where the shading system will be, either to the top of a window if inside mounting, or to the top of the roll, enclosure, and brackets above a window, or up to the top of a pocket in the ceiling (consider height of enclosures range from 3"-5" typically and 7"-9" for larger dual rollers).
It is important when ordering shades to order them at the full shading system height and not just the window height to ensure there is enough fabric on the tube. We require a wrap and a half for fabric attachment, and it is added to the ordered height when fabricated. This additional wrap varies by tube size and is factored into the R.U.D. calculator results based on the tube selected.
When choosing tube diameter consider these Max Widths (for 96" height) and contact customer service if you have any questions:
1.5" tube - 96" max width
2" tube - 120" max width
2.5" tube - 144" max width
3.25" tube - 156" max width
Roll Up Diameter Calculator