Exploring Atlanta’s modern homes

A curtain order that looks correct on a product page can still fail in the room if the window was measured casually. Glow Innovate publishes this guide so customers in the United States can take three numbers—width, length, and mounting height—before they choose a pair of panels.

Start with the hardware, not the glass. Decide whether the rod will sit on the trim, several inches above the trim, or close to the ceiling. A rod mounted four to six inches above the frame makes the window read taller. A ceiling mount is appropriate for short walls and for sliding doors that need a continuous line of fabric. Write down the mounting height first. Length is then measured from that point, not from the top of the window opening.

For width, measure the rod span you intend to use, not only the glass. A finished look generally requires the combined width of the panels to be one and a half to two times the rod span. A single 52-inch panel on a 52-inch rod will look flat and will not close without a gap. Two 52-inch panels on a rod of about 50 to 60 inches are a common household combination. Extra-wide patio doors often need one very wide panel or two wide panels rather than a pair of narrow bedroom panels stretched across the glass.

For length, measure from the underside of the rod (or from the grommet line you expect to use) to the point where you want the hem to fall. There are three conventional finishes in American homes: hovering just above the sill, breaking lightly on the apron, or clearing the floor by about one-half inch. Puddled hems collect dust and are difficult to vacuum around. If the floor is uneven, measure at both ends of the rod and use the shorter result.

Grommet, rod-pocket, back-tab, and pinch-pleat headings consume height differently. Grommets sit on the rod and shorten the visible drop by roughly the diameter of the rod plus the metal ring. Pinch-pleat panels that hang from rings below the rod will read longer than the same cut used as a rod pocket. If the listing states a finished length, treat that number as the fabric drop the maker is selling, and compare it with your own rod-to-floor measurement.

Record the numbers in inches, not in approximate feet. Note obstructions: locksets on a patio door, baseboard heaters, and the swing of a nearby door. If you are replacing existing drapery, do not assume the old pair was measured correctly. Take the window again.

These steps do not require a specialist. A steel tape, a step stool, and a written note of width, length, and heading type will prevent the most common mismatch between a listing and a finished window.