Measure the window, then the curtains
Curtains that are too narrow look skimpy when closed, and curtains that are too short make a room look smaller. A few simple rules give a tailored look whether you buy ready-made panels or sew your own.
Width
- Rod length = window width + extension on each side. Extending the rod 4 to 10 inches beyond the frame lets the curtains clear the glass when open.
- Total curtain width = rod length × fullness. A fullness of 2 is standard for gathered curtains, 1.5 for grommets and flat panels, and 2.5 to 3 for sheers and pinch pleats.
- Width of each panel = total width ÷ number of panels.
Length
Measure from the top of the rod, or from the bottom of the rings for ring-top curtains, to where the curtain should end:
- Sill length: about ½ inch above the sill, for small windows and kitchens.
- Apron length: about 4 inches below the sill.
- Floor length: about ½ inch above the floor, the most common choice in living rooms and bedrooms.
- Puddled: 2 to 6 inches longer than the floor, for a formal, relaxed look.
Mounting the rod 4 to 6 inches above the frame, or halfway to the ceiling, makes the window and the room look taller.
Example
A 48-inch window with the rod extending 6 inches on each side, 2× fullness, two panels and an 84-inch drop:
- Rod: 60 in
- Total curtain width: 120 in
- Each panel: 60 in wide and 84 in long
- Sewing your own from 54-inch fabric: 3 widths, each cut 96 inches long with a 12-inch allowance, so about 8 yards
Buying ready-made panels
Ready-made panels often come 50 to 54 inches wide and 63, 84, 95, 108 or 120 inches long. If your ideal panel is 60 inches wide, buy two panels per side or choose wider panels. When in doubt, go slightly longer, as hems are easier to shorten than to lengthen.
Sewing tips
- Add one pattern repeat per length for patterned fabric, and cut all lengths from the same point of the pattern.
- Allow for side hems, usually 1 to 1½ inches on each edge.
- Lining improves the drape, protects the fabric from sun and adds insulation; blackout lining is useful in bedrooms.
- Pre-wash or check the shrinkage of natural fabrics such as cotton and linen before cutting.