Measure and verify
Measure the actual window, rod or track, hanging point, enclosure, and selected product. Finished dimensions and tolerances vary by manufacturer. Package width may describe one panel or a pair.
Fabric and patterns
Fabric can shrink, stretch, skew, or behave differently by fiber, weave, finish, lining, and care. Pattern matching, nap direction, flaws, seaming, and workroom technique can increase the required amount.
Hardware boundaries
Fullness and stack-back are recommendations. Rods, tracks, tape, hooks, rings, and carrier systems have manufacturer-specific requirements. This site makes no fixing, bracket, structural, or load-bearing claim.
Custom orders
Ask a professional workroom to verify expensive custom-fabric quantities and finished dimensions before cutting or placing a nonreturnable order.