Made-to-measure curtains provide a perfect way to fit any window, but only if the measurements are correct. Many people order custom curtains and end up with results that disappoint them. The curtains may be too short, too narrow, or they might hang in an awkward way.
The difference between curtains that look professional and curtains that look wrong often comes down to how carefully someone measures before placing an order. Small errors in measurement can lead to big problems with the final product. A curtain that seemed like a good choice can turn out to be unusable simply because of a few centimetres missed during the measurement process.
This guide covers the most frequent mistakes people make and how to avoid them. Accurate measurements require attention to several factors beyond basic width and height. Understanding what to measure and how to take those measurements properly will help anyone order curtains that fit well and look exactly as intended.
1. Failing to measure both window width and height accurately
Many people make the mistake of measuring just once or in a single spot. However, windows often have slight variations in their frame sizes. These small differences can cause major problems with the final fit of made‑to‑measure curtains.
The best approach is to take three separate measurements for both width and height. For width, measure at the top, middle, and bottom of the window. For height, measure at the left, centre, and right positions.
After taking all measurements, use the smallest width and the longest drop. This method accounts for any irregularities in the window frame. It helps prevent curtains that are too short or too narrow.
A difference of even a few centimetres can leave gaps or create bunching. Double‑check all numbers before placing an order to avoid costly errors.
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2. Not allowing extra width for the curtain
Many people measure their curtain rod and assume that’s all the width they need. However, curtains need extra fabric to create pleats and folds. This extra width makes curtains look full and elegant instead of flat and stretched.
The standard rule is to multiply the rod width by 1.5 to 2 times. For example, a 2-metre rod needs curtains that measure 3 to 4 metres wide in total. This calculation gives the fabric enough room to gather properly.
The fullness ratio depends on the fabric weight and style. Heavier fabrics work well with 1.5 times fullness. Lighter materials need closer to 2 times the width to avoid a thin appearance. Tab-top and eyelet styles also require different amounts of fullness than rod pocket curtains.
3. Measuring only the glass area and ignoring the frame
Many people measure just the window glass and forget to include the frame. This mistake leaves gaps on the sides of the curtains. The curtains look too small and fail to block light properly.
The frame adds several centimetres to each side of the window. Therefore, measurements must extend beyond the glass to cover the entire window structure. Most experts recommend measuring from the outer edges of the frame, not the glass itself.
A person should measure the frame’s full width and add extra fabric on each side. This approach provides better coverage and improves the overall appearance. The curtains will hang correctly and create a more polished look in the room.
Always check the frame dimensions three times before placing an order. This simple step prevents costly errors and saves time on returns or adjustments.
4. Using a single measurement without double-checking
Relying on one measurement is a frequent mistake that leads to poorly fitted curtains. People often measure once and assume the result is correct. However, this approach creates problems because even small errors can affect how curtains hang and look.
A second measurement helps confirm the first reading is accurate. Tools can shift slightly, or a person might read the tape measure incorrectly. For example, someone might record 150cm instead of 155cm by mistake.
The best practice is to measure at least twice from the same position. If the numbers match, the measurement is likely correct. If they differ, a third measurement helps identify which reading is right. This simple step prevents costly errors and saves money on replacements.
5. Forgetting to consider the curtain header style in measurements
Different header styles need different amounts of fabric to look right. For example, eyelet curtains use less fabric than pencil pleat styles because of how they hang on the pole. Pinch pleat curtains also require extra fabric to create those signature folds.
The header affects both width and length measurements. Some styles sit higher on the pole, which changes where you measure from. Others add height to the overall curtain, so measurements need to account for this extra length.
People often measure the window and order curtains without checking which header they want first. However, the header choice must come before taking measurements. Each style has specific requirements for fullness and drop.
This mistake leads to curtains that bunch up awkwardly or look too flat and skimpy. The fix is simple: choose the header style first, then measure according to that specific style’s needs.
6. Measuring inward from the wall rather than outward to include space for curtains to stack
Many people measure from one wall to the other when they fit curtains. However, this method fails to account for the space that curtains need to stack back. The fabric has to gather somewhere to let light in and provide a clear view.
A curtain pole or track should extend beyond the window frame on both sides. This extra width allows the curtains to sit completely off the glass during the day. Aim for at least 15 to 20 centimetres of additional space on each side.
Without this extra room, the curtains will block part of the window even in the open position. The fabric will hang across the glass and reduce natural light. People often discover this problem only after their curtains arrive, which leads to disappointment and extra costs.
7. Ignoring the drop length needed for the curtain to just graze or puddle on the floor
Many people measure from the rod to the floor and assume that’s the exact length they need. However, this approach misses the final style choice. Curtains can kiss the floor, hover slightly above it, or pool with fabric at the base.
For a tailored look where curtains just touch the floor, measure to about half an inch above the ground. This prevents fabric from dragging on the floor whilst still appearing full-length. In high-traffic areas, leave a small gap of 0.5 to 1 centimetre to protect the fabric from wear.
For a puddle effect, add extra length to the measurement. A light puddle requires an additional 3 to 5 centimetres, whilst a more dramatic puddle needs 10 to 20 centimetres. The choice depends on the desired formality and style of the room.
Conclusion
Accurate measurements are the foundation of successful made-to-measure curtains. The most common mistakes include incorrect width and drop measurements, failure to account for curtain fullness, and neglect of pole or track position. Homeowners who measure twice, use proper tools, and follow clear guidelines will achieve better results. By avoiding these seven measurement errors, anyone can order custom curtains that fit properly and look professional.
