Curtain Size Lab Search

SIZES GUIDE · REVIEWED SEPTEMBER 11, 2026

Curtain Fullness: Ratios by Heading Style

Compare editable curtain-fullness ranges for grommet, rod-pocket, pleated, wave, cafe, and sheer curtains.

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

SHORT ANSWER

Start here

Curtain fullness is total flat fabric width divided by finished coverage width. A useful general range is 1.5× to 2.5×, but pleated and proprietary wave systems must use the workroom, tape, or carrier specification rather than a generic multiplier.

FormulaFlat width ÷ coverage
General range1.5×–2.5×
Wave systemsManufacturer-specific
Higher ratioMore cloth + stack

How to measure

  1. 01

    Measure the actual working rod or track width; if hardware is not installed, record the window-frame width and your planned side extensions separately.

  2. 02

    Measure the drop from the reference point stated for the selected heading—not from an unrelated edge of the window.

  3. 03

    Check whether a package contains one panel or a pair, then compare total flat fabric width rather than the label width alone.

  4. 04

    Recheck the selected product, tape, hooks, carriers, and fabric before ordering or cutting.

What 2× fullness means

A 72-inch working rod at 2× fullness uses 144 inches of flat curtain width across all panels. It does not mean each of two panels must be 144 inches wide.

Heading style changes the interpretation

Rod pockets and eyelets display free folds in the flat cloth. Pinch pleats permanently consume fabric. Ripplefold and Wave use snap tape and carrier spacing, so the system chart controls the result.

Fabric changes the look

A stiff, heavy fabric can appear crowded at the same ratio that makes a fine sheer look airy. Test a sample for expensive custom work and confirm the selected heading hardware.

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.