How to Measure for Window Shades and Blinds
Ordering shades or blinds starts with a tape measure, but useful measurements involve more than a width and height. Window operation, frame depth, nearby handles, and the look you want can all affect the final choice.
Decide what you are measuring for
An inside mount sits within the frame and can create a built-in appearance when there is enough depth. An outside mount attaches on the wall or trim and may be useful for shallow, uneven, or limited openings. The right approach can vary from one window to another.
Measure width and height carefully
For an inside mount, measure width near the top, middle, and bottom, then measure height at the left, center, and right. For an outside mount, measure the area you want the treatment to cover, including desired overlap. Record each window separately and label the room and location.
Use a steel tape measure and take notes in the format your window professional requests. A simple sketch or clear photos can explain unusual trim, nearby obstacles, and windows that appear alike but measure differently.
Check the details around the window
Handles, locks, cranks, screens, trim, deep sills, nearby doors, and furniture can affect mounting and operation. Note the room's light pattern as well; measurements establish size but do not replace a conversation about privacy, glare, and use.
Also note whether the window swings inward, slides, or sits beside a door. In kitchens and bathrooms, nearby moisture and cleaning needs may influence the material discussion; bedrooms may prioritize privacy or light control.
Use planning measurements without guessing deductions
| Decision | What to check |
|---|---|
| Record the opening | Label width, height, recess depth and intended mount; use one unit consistently. |
| Photograph obstructions | Include handles, locks, trim and nearby walls. |
| Confirm final ordering size | Tim takes final measurements and applies the allowances needed for the selected product. |
Know when professional measuring helps
High, wide, irregular, angled, and difficult-to-reach openings often deserve a professional review. It can also help when several treatments need to align visually or a frame has limited mounting depth.
Bring notes and photos to a free consultation with Expressions in Window Fashions.
Common questions
Should I measure every window separately?
Yes. Even windows that look the same can have slightly different openings, and separate notes help identify the right treatment for each location.
Is an inside mount always better?
No. Inside and outside mounts each have practical and visual uses. Frame depth, trim, obstructions, and desired coverage all matter.
When should I ask for professional measuring?
Ask for help when windows are high, wide, unusually shaped, hard to reach, or located near handles, doors, furniture, or other obstructions.