For inside mount shades, measure width at the top of the opening.  Use the longest length of the window and order the shade as "inside mount."  The proper fit deductions will be made by the factory.  The fabric deduction on inside mount shades is 1 3/8".

For outside mount shades, measure the outside bracket-to-bracket width and order shades as "outside mount."  For exact fabric coverage, provide the fabric measurement and order the shades as "cloth measurement."  The shade roller width will be 1 1/4" wider than the fabric.  Universal brackets are supplied which can be used for all types of installations.

The actual shade length will be longer than the window height to provide additional fabric wrap on the roller tube, which is included in the price.