How to Measure for Vertical Blinds and Alternatives

Under 2 hours

Measure properly to get the right fit for your vertical and alternative blinds

Vertical blinds are made of vinyl or fabric vanes that hang from the top to the bottom of a window and are most commonly found on glass doors or tall windows.

They operate on a sliding track system that pushes the blinds out of the way to right side, left side or both for a clear exterior view. When the blinds slide to both sides, this type of system is known as a split stack.

Vertical blind alternatives include wood and fabric sliding panels, soft sheer vertical shades, woven wood panels and Verticell shades.
When measuring to fit any of these blinds to your windows, it is important to remember a few key things: 

• A steel tape measure is much more accurate than cloth measuring tape.
• Always measure to the nearest 1/8 inch. Don't round to a half or whole inch.
• Be careful about transposing measurements. Be sure to always have width and height clearly marked. Remember, always put your width measurement first and height last (W x H).
• When measuring for an inside mount, always record the actual window opening size when you order. The factory will make the necessary adjustments for your product to fit into the window frame.
• When measuring for an outside mount, add at least 4 inches to every side of the window to make sure your room is private and that you are blocking the most light.

This project guide highlights the process for choosing an inside or outside mount, and measuring for either one.


Choose an inside or outside mount
Choose inside outside mount - Measure Vertical Blinds Alternatives

• It's important to decide whether you want your window treatment mounted inside the window frame or outside of the window frame, above and around the window, before you do any measuring. 
• Inside mount refers to a blind that is mounted to the inside of your window frame. This type of mount is by far the most common choice, and is highly recommended. It makes for a simple, clean appearance. One thing to keep in mind is that inside-mounted products require a minimum amount of depth to install correctly.
• An outside mount is typically used in only two situations: if there are obstructions inside your window frame, such as an alarm sensor, or if your window frame lacks sufficient mounting depth to hold your blind.
• Outside mounts have many benefits, such as hiding an unattractive window, or making a window seem even larger than it actually is. When figuring out where to place an outside-mounted window treatment, please account for the height of the product's head rail when you make your measurements. Please take time to double check your measurements, as these blinds will be made for your exact window.

Measuring for an inside mount
Measuring inside mount - Measure Vertical Blinds Alternatives

• The first step is to measure the inside width of your window where your blind will be mounted. This will be the width that you order.
• The second step is to measure the exact height of your window in three places: left, middle and right. Choose the shortest of the three measurements. This is the height you will order.
• Now that you have completed these few simple steps, you are ready to place your order.

Measuring for an outside mount
Measuring outside mount - Measure Vertical Blinds Alternatives

The product details page for your blinds provides information on how much flat space is required around your window for installation. When you specify an outside mount, we will not take any size deductions. Your blinds will be made at the exact size you specify.
• Your first step is to determine the width of the blind you will order. If you have trim around your window, simply measure to the far edges of your trim from left to right. If your window has no trim around it, measure a distance from point A to point B that includes any extra width you may desire for light gap coverage and privacy. We recommend adding 2 to 3 inches to each side.
• Your second step is to determine the height of the blind you will order. If your window has a protruding sill, start from the sill and measure 2 inches beyond the top of your window opening to accommodate for mounting hardware. If your window sill does not protrude, we suggest you begin your measurement 2 to 3 inches below the sill for maximum coverage, and then measure 2 inches beyond the top of your window opening to accommodate your hardware.
• Record your measurement to the nearest 1/8-inch increment. This is the height you will order.