One hundred twenty inches is where curtains leave the retail map. The stock rack past this point is a rumor, and the rooms that need the length (11 foot ceilings, double-height entries, view walls in newer construction) are exactly the rooms where almost-right shows from across the house. This is engineering-adjacent sewing, and it's some of our favorite work.
The rooms that ask for it
Eleven foot ceilings are the core customer, common in newer LA builds and remodels where nine feet became the old normal. Mount the rod a few inches under the ceiling and the drop runs 118 to 126; we sew to the exact number. The length also serves 10 foot rooms mounted tight to the ceiling for maximum vertical effect, stair landings and entries where the architecture runs past the nominal story, and the bottom end of double-height spaces, where the question becomes whether to dress the full wall or hold a proportion; that judgment call is covered in the floor to ceiling guide.
Why length changes construction
Fabric is a column at this height, and columns need structure. We hem 120s with true double folds and corner weights as standard, add covered lead weighting where the fabric wants help, and recommend lining more insistently than at shorter drops, because ten feet of unlined fabric responds to every draft and humidity swing in the house. Interlining, the flannel layer between face and lining, is the difference between panels that hang and panels that stand, and at this length it's worth its cost in most formal rooms. Seams multiply too: proper fullness means two or three widths per panel, matched at the repeat, pressed flat, invisible from the room.
The math, briefly
Width first, as always: rod length times 2x to 2.5x fullness, divided across panels; height doesn't discount the rule. Yardage compounds quickly (a full pair often passes fifteen yards), and hardware carries the consequence, so brackets anchor to structure, long spans get center supports, and ceiling tracks get blocking verified before anyone drills. Motorization deserves a real look at this scale, both for daily convenience and because heavy panels traverse more smoothly on a motor than on a hand pull. Run your numbers through the measurement tool to see the width and yardage for your actual wall.
A recent 120 inch order
Representative: an entry hall with an 11 foot ceiling and a single tall window beside the door, one wide panel rather than a pair, interlined Belgian linen, tailored pleat, sewn to 121 inches for a kiss on travertine, hung on a French-return rod anchored into studs at three points. One panel, one window, and the whole entry reads differently. Stock alternatives for that opening: none.
Ordering, two ways
Nationwide: measure carefully (tall drops reward a laser measure), send numbers and photos, and we review everything before cutting; the flow is on the custom made curtains page. In LA and Ventura counties, we measure free and install free, with the crews and ladders this height honestly wants. Nearby lengths: 108 inch below, extra long for everything past this.
Frequently asked questions
What ceiling height needs 120 inch curtains?
Rooms around 11 feet, mostly. An 11 foot ceiling is 132 inches, and rod placement a few inches below it produces drops in the high teens to mid-120s; 120 inch panels serve the conventional-mount version of that room. They also show up in 10 foot rooms mounted tight to the ceiling and in split-level spaces where the window wall runs taller than the room's nominal height. As always, the rod-to-floor measurement decides, not the ceiling stat.
Where can I buy 120 inch curtains?
This is the length where the stock market thins to almost nothing: a few retailers carry a handful of 120 inch options in basic fabrics, and past that you're in made-to-order territory whether you planned to be or not. We sew 120s the way we sew every length, cut to your exact drop in any fabric from our library or the mills, which means you're not choosing from the three fabrics that happen to come long. You're choosing the fabric, and the length follows.
Do 120 inch curtains need special hardware?
They need honest hardware. A pair of lined 120 inch panels at proper fullness carries real weight, so brackets must be anchored to structure rather than hollow drywall, spans past six feet want a center support, and ceiling tracks need blocking checks before installation. None of this is exotic, but it's the length where hardware shortcuts start failing visibly. Every national order ships with hardware guidance sized to what you bought, and LA installs are done by our own crew.
How much fabric do 120 inch curtains use?
A 120 inch finished drop cuts from roughly 132 inches of goods once hems and header allowances are added, and a properly full panel usually seams two widths of 54 inch fabric, so a pair often consumes fifteen or more yards before pattern matching. Large repeats add more. That yardage is most of why this length costs what it does, and also why the drape of a well-made 120 reads so differently from a stretched stock panel.
Should 120 inch curtains puddle or float?
At this scale, both work; what fails is indecision. A half inch float keeps grand rooms crisp and is the practical answer anywhere with foot traffic or pets. A deliberate 6 to 12 inch puddle suits formal spaces in soft fabrics like linen and silk, and it's a commitment to occasional re-dressing. What we talk clients out of is the accidental one to three inch drag, which reads as a measuring error at any height and especially at this one.