Need Help? Contact Us

Enjoy 10% off your next order with FIRSTBLINDS10

All our blinds are hand made to measure

Check out our 5 Star Reviews

Free delivery on all orders over £169

Handmade to measure

High quality blinds guaranteed

Direct from the manufacturer

How to Measure Windows for Blinds: A Step-by-Step Guide


Accurate measurements for window blinds refer to the precise determination of the width, height, and other relevant dimensions of a window space before the installation of blinds. The importance of these measurements lies in ensuring a seamless and visually appealing integration of window blinds into a space. Precise measurements play a pivotal role in achieving the following:

Perfect Fit: Accurate measurements ensure that window blinds fit snugly within the window frame or designated space. This prevents gaps or overhangs, creating a polished and professional appearance.

Effective Light Control: Proper measurements contribute to the optimal functionality of window blinds in controlling natural light. Well-fitted blinds can effectively block or allow light as desired, enhancing the ambiance of a room.

Enhanced Privacy: Accurate measurements are essential for achieving the desired level of privacy. Well-fitted blinds prevent gaps through which outsiders might glimpse into a room, ensuring a secure and private environment.

Aesthetic Harmony: Precise measurements contribute to the overall aesthetic harmony of a space. Well-fitted window blinds complement the proportions of windows and surrounding decor, enhancing the visual appeal of the entire room.

Ease of Operation: Accurate measurements facilitate smooth operation of blinds. Properly fitted blinds are less likely to experience issues such as jamming or uneven movement, ensuring a hassle-free user experience.

Energy Efficiency: Well-fitted window blinds contribute to energy efficiency by minimizing gaps where heat or cold air can escape. This helps in maintaining a comfortable indoor temperature and may lead to energy cost savings over time.

  1. Understanding the Types of Window Blinds

Understanding the types of window blinds involves familiarizing oneself with the various styles and designs of window coverings available for enhancing privacy, controlling light, and contributing to the overall aesthetic of a space. The term encompasses a broad range of window treatment options, each characterized by unique features and functionalities. Here's a more detailed definition:

"Understanding the types of window blinds involves acquiring knowledge about the diverse styles and designs of window coverings designed to fit different preferences, practical needs, and interior decor schemes. Window blinds, a versatile category of window treatments, include various options such as horizontal blinds, vertical blinds, and specialty blinds. Horizontal blinds typically feature slats that can be tilted to control light and privacy, while vertical blinds consist of vertically hanging louvers or vanes, suitable for covering large windows or sliding doors.

These window blind types come in an array of materials, including wood, faux wood, aluminum, fabric, and vinyl, each offering distinct advantages in terms of aesthetics, durability, and maintenance. Specialty blinds may include options such as Roman blinds, cellular shades, and bamboo blinds, each characterized by unique construction and functionality.

Understanding the types of window blinds is essential for making informed choices when selecting window treatments for a specific space. Factors such as the size and shape of windows, desired levels of light control and privacy, and the overall decor style of a room play a crucial role in determining the most suitable type of window blind. By familiarizing oneself with these variations, individuals can make informed decisions that not only meet practical needs but also contribute to the visual appeal and ambiance of their living or working environments."

III. Necessary Tools and Materials

To measure window blinds accurately, you'll need a few essential tools and materials. These items ensure that you obtain precise measurements, allowing for a proper fit and a polished look when installing the blinds. Here's a list of the necessary tools and materials:

Measuring Tape:

A retractable measuring tape is crucial for measuring the width and height of the window accurately. Opt for a tape with clear markings for easy reading.

Pencil and Paper:

A pencil is essential for marking measurements on the window frame or jotting down the measurements. Keep a notepad or paper handy for recording the dimensions.

Ladder or Step Stool:

For windows that are out of reach, a sturdy ladder or step stool will ensure you can measure all areas of the window, including the top.


A level helps ensure that your measurements are accurate and that the blinds will hang straight. It's especially important for inside mount installations.

Notebook or Measurement Form:

Having a dedicated notebook or measurement form can help you keep all your window measurements organized, preventing confusion when it's time to order or install the blinds.

Assistive Person:

If possible, having someone to assist you can be beneficial, especially for large or hard-to-reach windows. They can hold the tape measure in place or help with noting down measurements.

Digital Camera or Smartphone:

Take pictures of the windows before and after measuring. This can serve as a visual reference, especially if you need to consult with experts or customer support.

Additional Tools for Unusual Window Shapes:

For windows with unique shapes, consider additional tools like a flexible curve ruler or contour gauge to capture irregular dimensions accurately.

Masking Tape or Painter's Tape:

Use tape to mark the exact locations where you'll be measuring, especially if you need to consider any obstructions or architectural details.


A basic calculator can be handy for making precise calculations, especially if you need to convert measurements or calculate overlap for inside mounts.

Having these tools and materials on hand will make the process of measuring your windows for blinds much smoother and help ensure that your chosen window treatments fit perfectly.

  1. Step-by-Step Guide
  2. Step 1: Measure the Width

Begin by measuring the width inside the window frame. Learn the nuances of handling irregularly shaped windows and ensure you get accurate measurements.

  1. Step 2: Measure the Height

Move on to measuring the height inside the window frame. This step requires attention to detail, especially for windows with unique features. We'll guide you through the process for flawless measurements.

  1. Step 3: Decide on Mounting Options

Understand the difference between inside mount and outside mount options. Your choice will impact the measurements, so it's essential to make an informed decision.

  1. Step 4: Account for Overlapping

Discover how to factor in overlap for proper light control and privacy. We'll provide tips to prevent light gaps and ensure your blinds function seamlessly.

  1. Step 5: Record and Double-Check Measurements

Emphasize the importance of accuracy by recording your measurements meticulously. We'll guide you on double-checking to avoid any discrepancies before ordering your blinds.

  1. Common Mistakes to Avoid

Learn from common measurement errors and understand the potential consequences. We'll provide tips on how to prevent and rectify these mistakes for a smooth measuring process.

  1. Additional Tips for Tricky Situations

Measuring windows for blinds can become more challenging when dealing with unique or unconventional window shapes. Here are some additional tips for handling tricky situations:

Bay Windows:

Measure each section of the bay window individually, treating them as separate windows. Record measurements for the width and height of each segment. Ensure accuracy by measuring the diagonal distances as well.

Arched Windows:

For arched windows, measure the width and height at the widest points. If the arch is a perfect half-circle, simply measure the diameter. If it's a partial arch, measure the width at the base and the height from the base to the highest point.

Corner Windows:

Treat each windowpane in the corner separately. Measure the width and height of each window, and consider if you want blinds to meet in the corner or if you prefer a small gap.

Floor-to-Ceiling Windows:

Measure the width and height in multiple places, especially if the floor or ceiling is uneven. Ensure the blinds will have enough clearance at the bottom and top for smooth operation.

Tilt and Turn Windows:

For windows that tilt or turn, measure both the open and closed positions. Take note of any handles, cranks, or other obstructions that might affect the placement of the blinds.

French Doors:

Measure each door individually, including any glass panels. Consider if you want the blinds to cover the entire door or just the glass portion. Pay attention to handles and locks that may impact the installation.

Dormer Windows:

Measure the width and height at the widest points for dormer windows. Consider any sloping angles or protrusions that might affect the fit of the blinds.


Measure the width and height of the skylight opening. Consider whether you want blinds that open and close or if you prefer a fixed covering.

Windows with Muntins (Grids):

Measure each individual pane separately. Decide whether you want blinds for each pane or if you prefer a continuous covering.

Uneven Window Sills:

Measure from the highest and lowest points on the window sill to ensure the blinds will clear any uneven surfaces.

Always double-check your measurements and consider consulting with a professional or the blinds manufacturer if you're unsure. Many companies provide specific instructions for measuring in challenging situations to ensure a perfect fit.

VII. Conclusion

As we wrap up, remember that taking the time to measure your windows accurately is an investment in the overall look and functionality of your window blinds. Follow our guide, and you'll be on your way to a seamless and satisfying window treatment experience.

VIII. Call-to-Action

Ready to explore the world of window blinds? Visit our website to discover a wide range of options that will perfectly complement your accurately measured windows. If you have any questions or need further assistance, our customer support team is here to help. Your perfect window blinds await!


Back To All Blogs