Curtain Size Lab Search

STYLE GUIDE · REVIEWED SEPTEMBER 11, 2026

Curtain Types and Styles: Sizing by Heading

Compare grommet, rod-pocket, tab-top, pinch-pleat, pencil-pleat, wave, cafe, and sheer curtain measurement conventions.

MEASURED WIDTHFINISHED DROP
Original proportional diagram. Use actual measurements; drawing is not to scale for a specific product.

SHORT ANSWER

Start here

Curtain type changes how width and drop are interpreted. Flat gathered styles are usually compared by total flat width and a fullness ratio; sewn pleats may be ordered by finished coverage; wave and ripple-fold treatments depend on the selected carrier and tape system. Always use the product-specific heading reference.

Flat headingsUse total flat width
Sewn pleatsConfirm finished coverage
Wave systemsUse system chart
LengthMeasure from attachment point

How to measure

  1. 01

    Measure the usable rod or track span and record decorative finials, returns, bends, or overlaps separately.

  2. 02

    Measure the finished drop from the attachment point named for the selected heading to the intended lower endpoint.

  3. 03

    Convert inches and centimeters only after recording the original measurement; use 1 inch = 2.54 centimeters.

  4. 04

    Compare the calculated target with the exact product label, package quantity, heading take-up, and manufacturer tolerance before ordering.

WORKED CALCULATION

One rod, different sizing language

Working rod width
72 in (182.9 cm)
Soft gathered example
2× fullness
Pre-pleated example
72 in finished coverage
Formula72 in × 2 = 144 in total flat width for the gathered example

144 in (365.8 cm) flat width—or 72 in finished pleated coverage, if that is how the maker specifies it

These are different order conventions. Confirm the heading specification before applying a multiplier.

Recalculate with your measurements

Grommet, rod-pocket, and tab-top

These ready-made headings display folds in the flat panel. The pole diameter, pocket or tab depth, and manufacturer-stated overall length change how the fabric sits relative to the rod.

Pinch-pleat and pencil-pleat

Pleats consume fabric to create a finished face width. A workroom may ask for finished coverage rather than flat cloth width, so do not apply a fullness multiplier twice.

Wave and ripple-fold systems

Carrier spacing, snap tape, pocket factor, and stack calculation belong to the selected system. Generic fullness is useful for comparison but not a substitute for its chart.

Cafe and sheer treatments

Cafe curtains cover a selected portion of the window; sheers are strongly affected by fabric openness. Neither term supplies a universal length, width, or privacy result.

Before you order or cut

Measure the actual window and selected product. Finished sizes, fullness, header take-up, hardware geometry, and manufacturer tolerances vary. Fabric can shrink, stretch, or behave differently by composition. Measurements do not guarantee fit, privacy, water containment, installation, load capacity, or structural safety. Use the selected product instructions, and have a professional workroom verify expensive custom-fabric orders.

SOURCE NOTES

What this page is based on

Measurements here combine mathematical results with labeled commercial conventions and design recommendations. Disagreements are kept as ranges rather than averaged into a false standard.

  1. MATILDA curtain product specificationsIKEA · reviewed 2026-09-11

    Manufacturer product guidance presents 1.5×, 2×, and 2.5× rod/track-width options for light through extra-full looks.

  2. Buying curtainsJohn Lewis & Partners · reviewed 2026-09-11

    Retailer/workroom guidance on pole extension, hanging references, sill/floor endpoints, ready-made metric ranges, and double fullness.

  3. Ripplefold fabrication guideKirsch · reviewed 2026-09-11

    Proprietary system manual with 60%, 80%, 100%, and 120% fullness options (approximately 1.6× to 2.5× fabric factors).

  4. Wave curtain workroom guideSilent Gliss · reviewed 2026-09-11

    Proprietary wave-system workroom guide; glider spacing and pocket factor determine approximate fullness, including a 2.1× example.