How to Measure for Cellular Shades: A Step-by-Step Checklist

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A useful cellular-shade measurement record starts with the exact product and ends with a checked order, not a universal width formula. Keep what you measured separate from what you eventually submit. This checklist helps you identify missing information before buying a conventional bracketed shade or an adhesive-mounted Stick2Fit shade.

Identify the product before choosing the rule

Give each opening a stable name, such as bedroom-street. Record the seller, product URL, fabric, lift, headrail option and intended mount. Save the matching measuring and installation instructions with the date you checked them.

Installation system matters. The Select Single Cell product separates configuration requirements and a No-Drill Headrail option. Its installation booklet includes bracket installation and obstruction checks. By contrast, the Stick2Fit product specifies adhesive mounting. Do not transfer one system’s instructions to another because both use cellular fabric.

For a multiroom project, keep the opening names consistent with your window-covering project brief. Each opening still needs its own record.

Check the surface and clearance

Mounting depth and flush depth are different checks. SelectBlinds’ cellular measuring guide lists separate requirements for secure mounting and a recessed installation, and says feature options can change the requirements. Copy the exact selected configuration’s requirements into your notes; do not use a category-wide minimum.

Record the usable mounting surface, trim, handles, cranks and locks. Check their positions through the window’s normal movement. Ask how the selected headrail and fabric will clear those obstructions. A single depth reading does not describe every possible interference.

For Stick2Fit, read the adhesive installation guide, including its surface preparation and paint-curing instructions. Record your surface material and condition for confirmation. An adhesive attachment and a bracket fastened into the frame require different preparation.

Keep the raw readings

Label width and height separately, include the unit, and keep the original readings before applying an ordering rule. The general cellular guide calls for widths at the top, middle and bottom, and heights at the left, center and right. Follow the exact product’s directions for where the tape starts and ends.

The cellular measuring worksheet can record these readings and download a checklist. Keep product links, surface observations and seller replies alongside it; the tool does not verify a specific product’s fit or generate final order dimensions.

Do not resolve conflicting instructions by guessing. In our November 5, 2026 read, the Stick2Fit product’s Recommendations section said “use the top measurement when ordering”, while its Measuring section said “Use the smallest width out of those numbers.”

If those readings differ, send the seller your selected configuration and all raw readings. Ask which width, height, rounding and deduction instructions apply to that order, and retain the answer. Even matching width readings do not settle the remaining configuration questions. Keep the order pending if the answer is unclear.

Plan outside coverage separately

Opening size is not your coverage plan. For an outside mount, sketch the proposed headrail position and the area you want covered. Record nearby trim, furniture and moving hardware. Get the exact product’s mounting-surface and coverage instructions before turning that sketch into submitted dimensions.

Do not add a generic overlap or subtract a guessed factory allowance. SelectBlinds’ general guide says “Do not make your own deductions.” Check that the instructions you retain apply to the product, mount and options in your cart.

Complete one record per opening

Use a blank row when something is unresolved; do not replace it with another window’s answer.

For example, two similar bedroom windows might have different handles. Copy the record format, then inspect and measure each opening independently. A completed record for one window is not proof that the other accepts the same installation.

Review the cart against the record

Compare the opening label, quantity, product, fabric, lift and mount with your notes. Then check each submitted dimension against the applicable instructions. Keep unresolved questions visible until answered.

Use the sample comparison guide for separate material observations; a swatch does not approve mounting compatibility. Save the final configuration and order confirmation with your record.

The product links below are starting points to inspect, not confirmation that a model fits your opening. At the merchant, review the variant, mounting instructions and any prefilled width and height before asking for a current configured quote.

Method

Original BlindSpec worksheet and hypothetical example. Official measuring, product and installation documents reviewed November 5, 2026. This is a preparation guide, not a completed fit assessment.