Proper Window Measurements:
Finished measurements for both inside mount and outside mount are calculated from the top of the headrail to the bottom of the bottomrail (for verticals, the bottom of the slats) for the height. The width is from the left edge of the window treatment to the right edge. Based on the mount and lift system, a deduction may be made from the measurements you provide.

Scroll down to see deductions summaries, or click on a specific product:
Cellular Shades
Roman Shades
Sheerweave Shades


Inside Mount Blinds & Shades
'Inside Mount' means that it fits WITHIN the window frame/opening. Inside mount blinds and shades have specific deductions taken by the factory for operating clearance (so they don't rub). Please DO NOT take any deductions of your own. For more specific details please go to to the product page for the product you are interested in to view detailed measuring instructions before completing your order.

Outside Mount Blinds & Shades
An 'Outside Mount' means that it overlaps (goes beyond) the window opening for both width AND height. Allowances are NOT taken by the manufacturer on this product - you must ADD to the width AND height for proper coverage, privacy and installation bracket mounting. You will need to supply us the exact measurements that you would like the window treatment to be (not the window size). This includes adding extra for the width and the height to clear any trim, etc.

See the Premium or Cordless Lift System definition here.





DEDUCTIONS FOR CELLULAR SHADES

Standard Lift System

  Inside Mount
  • Head Rail - approx. 7/8"
  • Fabric - approx. 1/2"
  • Bottom Rail - approx. 1/2"
  Outside Mount - NO deductions
 

Premium Lift System

  Inside Mount
  • Head Rail - approx. 3/4"
  • Fabric - approx. 3/8"
  • Bottom Rail - approx. 3/8"
  Outside Mount - NO deductions
 

Cordless Lift System

  Inside Mount
  • Head Rail - approx. 3/8"
  • Fabric - approx. 3/8"
  • Bottom Rail - approx. 3/8"
  Outside Mount - NO deductions
 




DEDUCTIONS FOR ROMAN SHADES

Standard Lift System

  Inside Mount
  • Head Rail - approx. 1/4"
  • Fabric - approx. 5/8"
  Outside Mount
  • Head Rail - NO deduction
  • Fabric - approx. 3/8"
 




DEDUCTIONS FOR SHEERWEAVE SHADES

Standard Lift System

  Inside Mount
  • Tube - 1-1/4"
  • Fabric - 1-1/4"
Note: When assembled, the shade will be approx. 1/4" smaller than the width specified by the customer.

  Outside Mount
  • Tube - 1"
  • Fabric - 1"
 
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