Measuring Instructions for Arches Menu

We've made it easy to measure for and cover your arched windows. No longer will you need to leave it uncovered or compromise when it comes to fit and style. We've removed the need to create and send in a template, saving you time and hassle. All we need are a few measurements and your custom-made arch will be produced and shipped to your door in no time.

View Instructions for Inside Mount
Inside mounted arches mount inside the window casing and do not cover the window molding.
View Instructions for Outside Mount
Outside mounted arches are mounted on the wall and cover the window molding.

Instructions for Inside Mounted Traditional Arches

Depth Requirements

The first step is to confirm that your window is deep enough for an inside mount. The product’s minimum mounting surface requirements are under the “Product Info” tab on the product’s information page.

Measuring the width

Measure only the window opening.
To determine the width, measure from left to right at the bottom of the arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds. (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
This is the width you will use when ordering.

Measuring the height

Measure only the window opening.
To determine the height, divide your width in half and measure the height at that location.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds. (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
This is the height you will use when ordering.

Please do not make your own deductions. We'll take care of that for you. This ensures that your product will be the perfect fit. If you feel you need to add width for better light coverage, order an outside mount instead. Please review the deduction chart below, which we’ll use when making your order.

Instructions for Inside Mounted Elongated Arches

Follow the same instructions as listed for inside mounted traditional arches. The only additional size information that will be needed will be the leg height.

Measuring the legs

Measure the inside portion of the window.
To determine the height of the legs, measure from the bottom of the sill to where the curvature of the arch begins.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
This is the height of the legs you will use when ordering.

Instructions for Inside Mounted Quarter Arches

Measuring the width

Only measure inside the window opening.
To determine the width, measure from left to right at the bottom of the quarter arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
Use this width measurement when ordering.

Measuring the height

Measure only the window opening.
To determine the height, measure at the left or right side of your window (depending on whether it is a left or right facing quarter arch). This should be the tallest portion of your window.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
This is the height measurement you will use when ordering.

Instructions for Outside Mounted Traditional Arches

Since an outside mount covers the window opening and frame fully, there are additions you need to make to make sure the correct size is ordered. We will make your product to the measurements you give us, and we won’t make changes or additions.

Flat surface requirements

First, decide where you want to mount the blind outside of the window frame. You need at least 1" of flat surface. You can mount it anywhere below the window opening, making sure to add to the height the lower you go. More specific information can be found under the "Product Info" tab on the product's information page.

Measuring the width

Measure only the window opening.
To determine the width, measure from left to right at the bottom of the arch.
Make a minimum addition of 2" on each side or 4" total. For example, if the window opening is 32", it would be helpful to order 36". This will provide 2" of coverage on each side of the window for maximum privacy and light gap coverage.
You can order narrower or wider based on your application, but the above example is a typical addition.
This is the width you will use when ordering.

Measuring the height

Measure only the window opening.
To determine the height, divide your width in half and measure the height at that location.
Add a minimum of 3" to the size. For example, if the window height is 32", it would be helpful to order 35". This will provide enough overlap for maximum privacy.
You can order taller or shorter based on your application, but the above example is a typical addition.
This is the height you will use when ordering.

Instructions for Outside Mounted Elongated Arches

Follow the same instructions as listed for outside mounted traditional arches. The only additional size information that will be needed will be the leg height.

Measuring the legs

Measure the inside portion of the window.
To determine the height of the legs, measure from the bottom of the sill to where the curvature of the arch begins.
The height of the legs will depend on where the bottom of the bottom rail will be placed. Make sure to add at least 2" to the height of the legs.
You can order taller or shorter based on your application, but the above example is a typical addition.
This is the height of the legs you will use when ordering.

Instructions for Outside Mounted Quarter Arches

Measuring the width

Only measure inside the window opening.
To determine the width, measure from left to right at the bottom of the quarter arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
Use this width measurement when ordering.

Measuring the height

Measure only the window opening.
To determine the height, measure at the left or right side of your window (depending on whether it is a left or right facing quarter arch). This should be the tallest portion of your window.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
This is the height measurement you will use when ordering.

Was this article helpful?

Yes No

Honeycomb/cellular arches offer a modern style and increased energy efficiency. Get the right amount of light by choosing either light filtering or blackout fabrics.

Arches	Depth required for secure inside mount	Depth needed for flush inside mount	Depth for outside mount	Total Deduction for inside mount
Premier Single & Double Cell / Minimalist	1 1/4"	2 1/4"	3/16" added to rail only	rail 3/16" fabric 3/8"
Luxe Modern / Eclectic	3/4"	2 3/8"	N/A	rail 3/16" fabric 3/8"

Instructions for Inside Mounted Traditional Arches

Depth Requirements

The first step is to confirm that your window is deep enough for an inside mount. The product’s minimum mounting surface requirements are under the "Specifications" tab on the product’s information page.

Measuring the width

Measure only the window opening
To determine the width, measure from left to right at the bottom of the arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds. (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
This is the width you will use when ordering.

Measuring the height

Measure only the window opening.
To determine the height, divide your width in half and measure the height at that location
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds. (For example, if the smallest measurement is 24 9/16," round down to 24 1/2". If it's 24 3/8", no need to round down.)
This is the height you will use when ordering.

Please do not make your own deductions. We'll take care of that for you. This ensures that your product will be the perfect fit. If you feel you need to add width for better light coverage, order an outside mount instead. Please review the following deductions/additions we will use when making your order:

Instructions for Inside Mounted Quarter Arches

Measuring the width

Only measure inside the window opening
To determine the width, measure from left to right at the bottom of the quarter arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
Use this width measurement when ordering

Measuring the height

Measure only the window opening.
To determine the height, measure at the left or right side of your window (depending on whether it is a left or right facing quarter arch). This should be the tallest portion of your window.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
This is the height measurement you will use when ordering.

Instructions for Outside Mounted Traditional Arches

Flat surface requirements

First decide where you want to mount the blind outside of the window frame. You need at least 1" of flat surface. You can mount it anywhere below the window opening, making sure to add to the height the lower you go. More specific information can be found under the "Specifications" tab on the product's information page.

Measuring the width

Measure only the window opening
To determine the width, measure from left to right at the bottom of the arch.
You’ll use that measurement and add the recommended minimum of 4 inches. For example, if the window opening is 32", it would be helpful to order 36". This will provide 2" of coverage on each side of the window for maximum privacy and light gap coverage.
You can order narrower or wider based on your application, but the above example is a typical addition.
This is the width you will use when ordering.

Measuring the height

Measure only the window opening.
To determine the height, divide your width in half and measure the height at that location.
Make a minimum addition to the size of 4". For example, if the window height is 32", it would be helpful to order 36" This will provide enough overlap for maximum privacy.
You can order taller or shorter based on your application, but the above example is a typical addition.
This is the height you will use when ordering.

Instructions for Outside Mounted Quarter Arches

Measuring the width

Only measure inside the window opening
To determine the width, measure from left to right at the bottom of the quarter arch.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
Use this width measurement when ordering

Measuring the height

Measure only the window opening.
To determine the height, measure at the left or right side of your window (depending on whether it is a left or right facing quarter arch). This should be the tallest portion of your window.
Round down to the nearest 1/8” if you are receiving a measurement in 16^ths or 32^nds.
This is the height measurement you will use when ordering.