Lesson 1
A false balance is abomination to the LORD: but a just weight is his delight.
Proverbs 11:1
Reading the Window: Rod Placement, Fullness, and Cut Sizes
Most disappointing curtains were lost before a single stitch was sewn. They were measured against the window instead of against the rod, and cut the same width as the opening they were meant to cover. The cloth was fine, the sewing was fine, and the panels still hang like two flat sheets pinned to the wall. Everything that makes a curtain look like a curtain — the soft vertical folds, the generous sweep, the way it clears the glass when you draw it back — is decided by arithmetic done ahead of time.
Put the Rod Up First
Do not measure until the rod is on the wall. The rod, not the window, is the thing your panels must fit.
Rods are normally set 4 to 12 inches above the top of the window frame, and they extend past the frame on both sides. Mounting high draws the eye up and makes a short window look tall; mounting the rod just at the top of the frame chops the window off and makes the whole wall look squat. Extending past the frame gives the open panels somewhere to sit that is not on top of the glass, so daylight comes in unblocked.
With the rod mounted, take three numbers and write them down on paper — not on your phone, not in your head:
- The rod width, bracket to bracket, measured with a steel tape.
- The drop, from the point where the top of the finished panel will sit down to where you want the hem to end — sill, apron, or floor.
- The rod diameter, if you are making a rod pocket. A continental rod of about 2 1/2 inches needs a pocket built for it; a slim café rod does not.
Measure the drop at both ends of a wide window. Old houses are rarely square, and a half inch of slope at the top will show plainly at the hem.
Fullness: The Number That Makes or Breaks It
Fullness ratio is total curtain width divided by rod width. Flat panels have a ratio of 1. Real curtains do not.
- 2x is the classic all-purpose fullness. If you remember one number, remember this one.
- 1.5x to 2x suits grommet headings, which hold their own folds.
- 2x to 2.5x suits pinch pleats.
- 2x to 3x suits sheers, which need extra gathering to read as fabric at all rather than as a haze.
Below 1.5x a curtain looks starved no matter how good the cloth is.
So: rod width 60 inches, 2x fullness, gives 120 inches of finished curtain width. Split between two panels, that is 60 inches finished per panel. Then add what the sewing will eat: side hems and any seam allowances where widths are joined. A standard side seam allowance for curtain work is 5/8 inch, and a double-fold side hem consumes twice its visible depth.
Cut Length: Add Before You Cut
The most common cutting error is treating the drop as the cut length. It is not. Cut length equals finished drop, plus the heading allowance at the top, plus the hem allowance at the bottom.
A double-fold hem always takes twice its finished depth. A 1-inch hem needs 2 inches of cloth; a 3-inch hem needs 6 inches. Curtains want deep hems — 2 to 3 inches showing — because the weight steadies the panel and keeps the bottom edge from flaring and twisting. So budget 4 to 6 inches at the bottom before you touch the shears.
Write the whole sum out longhand for one panel, then check it a second time on a different sheet of paper. Cloth cut short cannot be uncut.
An Honest Tape
A false balance is abomination to the LORD: but a just weight is his delight. Scripture takes measuring seriously, and it is not only about the marketplace. A tape read carelessly, a number rounded because the true figure was inconvenient, a drop guessed rather than checked — these are small dishonesties with cloth, and they punish the person who made them. Careful measuring is a quiet form of truthfulness, and it is the cheapest thing in the whole project. The tape costs nothing to read twice.
When It Still Goes Wrong
If a finished panel looks limp, the fullness was too low; there is no rescue but more width. If the curtains make the window look small, the rod is too short or too low. If the hem runs downhill across a wide window, the drop was taken at one end only. Each of these is a measuring fault, and each is caught in ten minutes of paperwork before the first cut.
Check yourself
Fullness ratio is calculated as:
- Window width divided by rod width
- Total curtain width divided by rod width
- Cut length divided by finished drop
- Hem depth divided by seam allowance
Answer
B. Total curtain width divided by rod width
What is described as the classic all-purpose fullness ratio?
- 1.2x
- 1.5x
- 2x
- 4x
Answer
C. 2x
Curtain rods are normally mounted how far above the top of the window frame?
- 4 to 12 inches
- Level with the frame
- 1/2 to 1 inch
- 18 to 24 inches
Answer
A. 4 to 12 inches
A double-fold hem with 3 inches showing requires how much cloth allowance?
- 3 inches
- 4 inches
- 6 inches
- 1 1/2 inches
Answer
C. 6 inches
Why should the drop be measured at both ends of a wide window?
- To average the two numbers for the cut length
- Because old houses are rarely square and slope will show at the hem
- Because the rod diameter changes across its length
- To calculate the fullness ratio correctly
Answer
B. Because old houses are rarely square and slope will show at the hem
Which heading type is matched with a 1.5x to 2x fullness?
- Sheers
- Pinch pleats
- Rod pocket with deep header
- Grommet
Answer
D. Grommet
Proverbs 11:1 is applied in this material to teach that:
- Expensive tools are worth the cost
- Careful, honest measuring is a form of truthfulness
- Curtains should be weighed before hanging
- Fabric should be bought by weight, not length
Answer
B. Careful, honest measuring is a form of truthfulness
Cut length equals the finished drop plus:
- The fullness ratio
- The rod diameter only
- Heading allowance plus hem allowance
- Twice the rod width
Answer
C. Heading allowance plus hem allowance
A finished panel that hangs limp and flat most likely suffered from:
- Too little fullness
- Too deep a hem
- A rod mounted too high
- Seam allowances that were too wide
Answer
A. Too little fullness
What is the standard seam allowance given for joining curtain widths?
- 1/4 inch
- 1/2 inch
- 1 inch
- 5/8 inch
Answer
D. 5/8 inch