How to Measure Your Windows for Blinds

Made to Measure

Window blinds can be an excellent alternative to curtains, especially in rooms where you want to be able to control the light. Roman blinds are great for privacy and can be the ideal choice for bedroom and living room windows.

Choose your Blind
Range of fabrics available at Graham & Brown
If you're opting for blinds, it's important to take specific measurements of your windows. This blog will take you through how to measure for blinds, whether your windows have deep, shallow or no recesses.
Opulence Spearmint roman blind in a hallway area

Types of blinds

At Graham & Brown, we sell two of the most popular types of blinds: roller blinds and roman blinds.

The difference between these blinds is the way in which they extend - roller blinds can be rolled and unrolled, whereas roman blinds fold upwards and downwards in pleats. They are also made from different fabrics: roller blind fabric is stiffer and has a blackout coating applied, and roman blinds are soft with an extra lining to make them blackout.

You can choose between two stacking finishes when ordering blinds from Graham & Brown - the stacked finish, where fabric neatly stacks behind itself, and the waterfall finish, where the fabric cascades when in the open position.

Both our roller blinds and roman blinds use a pulley mechanism, operated by a chain.

How to Measure:

1. Only use a metal measuring tape and record your measurements in cm.

2. Measurements must be accurate for a perfect fit. We will make the necessary allowances to ensure the blind fits the window/door*.

3. Decide on how you want the blind fitted – ‘Recess’ is within the window/door frame or ‘Exact’ is to your desired point on the wall outside of the window/door frame.
If you are opting for a blackout blind and you would like it to sit as close to the wall as possible, we advise that you order an ‘Exact’ fit blind instead of a ‘Recess’ blind.

4. Always measure the width first (across the window) and then the drop (top to bottom) in 3 places.

5. Record your measurements in the same order.

6. Look for any obstructions such as handles and ensure you leave enough room in front and there is enough space for the blind to fit into the recess.

7. Finally, re-check your width and drop measurements to ensure accuracy. For more information on measurements and tolerances, please refer to the FAQ page.

*Please note :
Recess roman blinds: 1-1.2cm will be removed from the overall width and drop so the blind fits comfortably. Please note, the gap between the edge of the fabric and the edge of the cassette is roughly 3mm on each side.

Recess roller blinds: 1-1.2cm will be removed off the width only. If you have selected a cassette, the width of the blind will be the width of the cassette and not the width of the fabric.

Cassette roller blinds: the gap between the edge of the fabric is roughly 2.5cm on the control side, and 2cm on the non-control side.
If you want your blind to be a certain length, then please choose an exact measurement blind.

Measuring a window with a deep recess

If your window has a deep recess, a blind will fit comfortably flush against the window whilst still leaving you room on the sill. However, if you have window handles or anything that protrudes on the inside of the window, you will need to leave a small space.

Deep recess - width measurement

Use a metal tape measure to measure the width of the inner recess. Take three measurements - one inside the recess at the top, one in the middle, and one along the inside of the sill at the bottom. Take the shortest measurement as your width. Please note that your width measurement quoted is the total product width including the mechanism.

Deep recess - drop measurement

For the length, or drop, again take three measurements - one down the right side, one down the middle, and one down the left. Take the shortest measurement as your drop and order your blind as a recess measurement. Graham & Brown will then make an allowance to ensure the blind fits into the recess.

Celeste Denim fabric scrunch
Celeste Denim fabric scrunch

Measuring a window with a shallow recess or no recess

If you don't have a window recess, or it is quite shallow, your blinds will need to hang outside the recess.

Shallow or no recess - width measurement

Use a metal tape measure to measure the width of the window from outside the recess and add 20cm to the result, to allow for a 10cm overlap on either side. Take three measurements - one across the top, one across the middle and one across the bottom. Use the largest measurement as your width. Please note that your width measurement quoted is the total product width including the mechanism.

Shallow or no recess - drop measurement

For the drop, measure from the top of the outside of your recess, down to as far as you'd like your blinds to hang. Add 10cm to this measurement and record the figure as your drop.

Not sure about blinds? Check out our guide to measuring your windows for curtains.

Measuring a square bay window

To create a perfect fit please follow the step-by-step guides:

1. Find the head rail depth of your chosen blind below.

Roller Classic: 55cm
Roller Cassette: 80mm
Roman Classic: 48mm
Roman Cassette: 80mm

2. Measure the central window from left to right and deduct the head rail depth twice from this measurement. E.g. for roller classic, deduct 110mm from this measurement.
3. Measure the sides into the back corners of the bay. This will be the width of the rail.
4. Deduct the head rail depth off your side measurement. E.g. for roller classic, deduct 55mm from each measurement.
5. Order all three blinds as an exact measurement.
6. For the drop, measure from where you want the top of the blind to be, to where you want it to finish. If you measure to the sill, deduct 10mm to allow the blind to move freely.
7. Finally, re-check your width and drop measurements to ensure accuracy. For more information on how to measure a bay window, please refer to our How To Measure Blinds video above.

Please note :

Note: If window handles protrude, take the measurement of the projection and add to each of the three measurements (if applicable).
TIP! For both the width and drop measurements, measure in three places for each window. For the width, measure top, middle and bottom and for the drop measure left, middle and right. Your window might not be square, so always give us the smallest measurement.

Measuring an angled bay window

The trick to measuring angled bays is to make a template. Follow our step-by-step guide:

1. Find the head rail depth of your chosen blind below:

Roller Classic: 55cm

Roller Cassette: 80mm

Roman Classic: 48mm

Roman Cassette: 80mm

2. Place two pieces of paper together. Using the head rail depth as your measurement, mark each piece of paper with a line in the same position. E.g. roller classic measure 55mm

3. Position your pieces of paper on the window sill and ensure both the line marks meet up. Please refer to our How To Measure Blinds video above for more details.

4. Using a pencil, mark the window sill where the edge of the paper meets the sill.

5. Do this for both corners of the bay.

6. Measure between each section, as shown in our How To Measure Blinds video above. This will determine the width of each blind needed. All blinds should be ordered as exact.

7. For the drop measure from where you want the top of the blind to be down to the sill or floor.

TIP! For both the width and drop measurements, measure in three places for each window. For the width, measure top, middle and bottom and for the drop measure left, middle and right. Your window might not be even, so always give us the smallest measurement.

Amara Moss roman blind in a angled bay window
5.0
Beautiful blind, matches my wallpaper and finishes the room perfectly.

Milososmall, New Forest

5.0
Proving slightly addictive. First the wall paper and paint. Then the blinds and finally the bedding.

Bandoman, Lytham st Annes

5.0
Absolutely love this blind! Great product, excellent customer service - will definitely be back for more!

Lesley Marshall, North West

Shop by Design

Celeste Denim roman blind paired with Roman Navy wallpaper in a hallway
Celeste Denim fabric scrunch

Plain

Bring effortless style to every room with our range of plain roman and roller blinds. Choose from a wide mix of colours and finishes, from calming blues to purple and green shades that elevate any space.

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New Eden fabric swatch

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Floral Boheme Stripe Blue and Green fabric scrunch

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Glasshouse Grey fabric scrunch

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