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Vertical Blinds Sizes: How to Measure and Select the Perfect Fit

vertical blinds sizes

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When it comes to window treatments, vertical blinds are a popular choice for their versatility and elegant appearance. However, to truly enjoy the benefits of vertical blinds, it’s crucial to ensure they are accurately measured and well-fitted. In this section, we will explore the importance of precise measurements and how to select the perfect size for your vertical blinds.


Having well-fitted vertical blinds offers several advantages, including:

Enhanced Aesthetics: Properly measured blinds provide a seamless and polished look, elevating the overall aesthetics of your space.

Improved Light Control: Well-fitted vertical blinds offer better light control, allowing you to adjust the vanes to regulate sunlight and privacy.

Understanding Vertical Blinds Sizes

Before diving into the measuring process, it’s essential to understand the different components of vertical blinds:

  • Headrail: The headrail is the top part of the blinds that houses the mechanism for opening and closing the vanes.
  • Vanes: These are the individual slats that hang vertically and can be adjusted to control light and privacy.
  • Bottom Weights: The bottom weights keep the vanes in place and ensure they hang neatly.
Hunter Douglas Vertical Solutions® blinds, sliding glass doors, patio door blinds, near San Francisco, California (CA)

The size of each component plays a significant role in determining how well the blinds fit your window.

Standard sizes for vertical blinds are available in the market, catering to various window types such as standard windows, patio doors, and sliding glass doors. Manufacturers offer blinds in different widths and lengths to accommodate different window dimensions.

Measuring for Inside Mount Vertical Blinds

vertical blinds sizes

Inside mount installation refers to placing the blinds inside the window frame, which provides a clean and streamlined appearance. Follow these steps to measure for inside mount vertical blinds:

1. Measure the depth

Ensure to measure the depth of your window or door and cross-reference it with the mounting specifications of your selected vertical blinds. If the window’s depth is insufficient to accommodate an inside mount for your preferred window treatment, you’ll have the option to opt for an outside mount or explore alternative window treatment options.

2. Measure the Width

Measure the width of the window frame at three points: the top, middle, and bottom. Use the narrowest measurement as the width for your blinds.

3. Measure the Height

Measure the height of the window frame at three points: the left, center, and right. Use the shortest measurement as the height for your blinds.

4. Consider Clearance Space

Make sure to leave enough clearance space between the blinds and the window frame to allow smooth operation.

5. Use a Steel Tape Measure

To ensure precision, always use a steel tape measure rather than a cloth or plastic one.

Measuring for Outside Mount Vertical Blinds

vertical blinds

Outside mount installation involves mounting the blinds on the wall or window frame outside the window recess. This method is ideal for windows without sufficient depth for inside mount or for covering unsightly window frames. Follow these steps to measure for outside mount vertical blinds:

1. Measure the Space Above Your Window

Compare the available area above your window to the blinds’ specifications. Ensure enough room for a flat mount above the window. If there is wide trim, you might be able to mount the blinds directly into it. Otherwise, mount them to the wall above the trim.

2. Measure the Window Width

If there is trim, measure the width from one edge to the other at the top, middle, and bottom. If there is no trim, measure across the window and add 2-3 inches on each side for overlap (a total of 4-6 extra inches). Use the narrowest of these measurements.

3. Measure the Window Height

If there is a window sill, measure from the sill to three inches above the top of the window opening. If there is no sill, start measuring two inches below the window and go three inches beyond the top of the opening. For sliding glass doors, measure from the floor to three inches beyond the top of the door frame.

4. Determine the Final Height Measurement

Measure the height at three locations: left, center, and right of the window frame. Select the shortest measurement as your height width measurement for the vertical blinds.

Accurate measurements are vital for outside mount vertical blinds to fit snugly and enhance the appearance of your windows.

Common Mistakes to Avoid

Even with the best intentions, mistakes can happen during the measurement process. Here are some common errors to watch out for:

1. Incorrect Width Measurement

Failing to measure all three points and using the widest measurement can result in blinds that are too wide and obstructive.

2. Neglecting Height Clearance

For inside mount blinds, not accounting for clearance space can cause the blinds to get stuck or scrape against the window frame.

3. Ignoring Overlaps

When measuring for outside mount blinds, overlooking the overlap needed for proper coverage can lead to light gaps and reduced privacy.

Taking extra care to avoid these mistakes will save you from the hassle of re-purchasing and reinstalling blinds.

Selecting the Perfect Vertical Blinds Size

Choosing the right size for your vertical blinds requires careful consideration of various factors:

Window Dimensions: Measure your window accurately to determine the ideal width and height for the blinds.

Stacking Options: Consider the stacking options, such as left, right, or split stacking, based on your room layout and preferences.

Control Styles: Decide whether you prefer wand, cord, or chain control for operating the blinds.

Each factor contributes to the overall appearance and functionality of the blinds, ensuring a perfect fit.

Achieve Perfectly Fitted Vertical Blinds with The Window Design Studio!

vertical blinds sizes

Accurate measurements are the foundation of well-fitted vertical blinds that not only enhance the aesthetics of your space but also provide excellent light control. Whether you opt for an inside or outside mount, following the step-by-step guide and avoiding common mistakes will lead to a hassle-free installation experience. By carefully selecting the perfect size and considering various factors, you can enjoy the benefits of perfectly fitted vertical blinds for years to come.

For expert assistance and a wide selection of vertical blinds and other window treatments, contact The Window Design Studio today! Achieve the ideal balance of style and functionality with their premium offerings.

Michelle Nielsen

Michelle Nielsen

A seasoned professional with three decades of industry experience, and a warm and reliable personality. She brings expertise in window coverings and personalized design solutions.

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