How to measure
- 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.
- 02
Measure the drop from the reference point stated for the selected heading—not from an unrelated edge of the window.
- 03
Check whether a package contains one panel or a pair, then compare total flat fabric width rather than the label width alone.
- 04
Recheck the selected product, tape, hooks, carriers, and fabric before ordering or cutting.
WORKED CALCULATION
Floor-hover example
- Ring eye to floor
- 96.5 in (245.1 cm)
- Chosen clearance
- 0.5 in (1.3 cm)
- Candidate length
- 96 in (243.8 cm)
96 in target finished drop
Verify multiple floor points, hook position, fabric behavior, and the product’s finished tolerance.
Recalculate with your measurementsHover above the floor
A small planned clearance can make movement and cleaning simpler. John Lewis provides an approximately 1 cm (about 1/2 in) clearance example, but uneven floors and product tolerance mean it is guidance, not a guarantee.
Touch or kiss the floor
A touch endpoint is visually precise and therefore sensitive to floor variation, header adjustment, fabric relaxation, and finished tolerance. Measure left, center, and right before deciding.
Break or puddle intentionally
A break adds a modest amount below the floor line; a puddle adds more. These are design choices, not fixes for an uncertain measurement, and fabric body changes the result.
Choose for the room and product
Door traffic, cleaning, nearby vents or heat sources, pets, and fabric care can affect the practical choice. This page does not prescribe a universal endpoint.
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.
- 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.
- Drapery hardware resource libraryKirsch · reviewed 2026-09-11
Manufacturer library for traverse-rod specifications, draw configurations, master carriers, pleated stack guidance, and system-specific order forms.