How To Measure for Arched Window Blinds and Shades

Helpful Hints Before You Begin Measuring for Arches:

• For the most accurate measurements, only use a steel tape measure.
• Don’t mix up width and height measurements. Always follow the width by height format (W x H) and mark them as such.
• Measure to the nearest 1/8 inch. Never round up or down to the nearest half or whole inch.
• If you’re measuring for more than one window, measure each one individually – never assume that your windows are the same size, even if they look alike.
• For cellular (honeycomb) shades, side mounts are upon request only and are not available for arches wider than 40”.
• Minimum window opening depth for inside mount is 1 ½”; if you want your window covering fully recessed (not sticking out of the window opening at all),  minimum depth is 2 ¼”.
• Make sure you have a good mounting surface at the base of the arch as most arches are bottom mount only.

To be a perfect arch, the height must be exactly half the width. If not exact, it’s considered a non-perfect arch. In some cases, you’ll need to provide a paper template of your window. Please call us at 866-551-3166 for more information.

1. To find the width, measure from left to right at the bottom of the arch. If you plan to mount a window covering below the arch (arches often sit atop another window), take into account where each window covering will need to mount.
2. For the height, measure from the very center of the width to the highest point on the arch.
3. For an inside mount, order your product in the exact measurements you took, with no deductions. The factory will apply deductions when making your product. For an outside mount, add 2” to both the width and height. Your product will be made to the exact measurements you specify.

This style arch is when the height is more than half the width. The arched part is steeper compared to the perfect arch.

1. To find the width, measure from left to right at the bottom of the arch. If you plan to mount a window covering below the arch (arches often sit atop another window), take into account where each window covering will need to mount.
2. For the height, measure from the very center of the width to the highest point on the arch.
3. For an inside mount, order your product in the exact measurements you took, with no deductions. The factory will apply deductions when making your product. For an outside mount, add 2” to both the width and height. Your product will be made to the exact measurements you specify.

An eyebrow arch will be shorter in height than a perfect arch.

1. To find the width, measure from left to right at the bottom of the arch. If you plan to mount a window covering below the arch (arches often sit atop another window), take into account where each window covering will need to mount.
2. For the height, measure from the very center of the width to the highest point on the arch.
3. For an inside mount, order your product in the exact measurements you took, with no deductions. The factory will apply deductions when making your product. For an outside mount, add 2” to both the width and height. Your product will be made to the exact measurements you specify.

This style has two vertical sides leading up to where the arch starts. The sides are called legs. You will take four different measurements for this style.

1. To find the width, measure from left to right at the bottom of the arch. If you plan to mount a window covering below the arch (including the elongated or “legged” portion), take into account where each window covering will need to mount.
2. For the height, measure from the very center of the width to the tallest point of the arch.
3. Measure each leg's height from the base to the point where it starts to curve into an arch. Make sure to measure both, as the legs may have slightly different measurements.
4. For an inside mount, order your product in the exact measurements you took, with no deductions. The factory will apply deductions when making your product. For an outside mount, add 2” to both the width and height. Your product will be made to the exact measurements you specify.