Great curtains dont start with fabric - they start with measuring. Most “curtain mistakes” come from two things: guessing the width and improvising the drop. Here is a clean, repeatable method that works for everyday windows and makes the end result look intentional.
Step 1: Decide where the rail or pole will sit
Before you measure, decide the placement. A higher pole usually makes the room feel taller, while a wider pole makes the window feel bigger. Once the position is chosen, measure from the pole or rail (not from the top of the window frame).
Step 2: Measure the width (this controls how “full” it looks)
Measure the pole or track width, then choose your fullness. Fullness is the difference between “flat fabric” and those soft, cosy folds that make curtains look premium.
- 1.5x the pole width: a lighter, more relaxed gather.
- 2x the pole width: a fuller, classic gather (most common).
If you are layering (for example, sheer + blackout), plan fullness for each layer so both can move freely without fighting each other.
Step 3: Measure the drop (choose the look)
Measure from the top of the pole/track down to your desired finish point. Pick one of these styles and stick to it for consistency across rooms:
- Sill length: ends at the window sill. Clean and practical for kitchens and bathrooms.
- Below sill / apron: a little longer than the sill. Softer look without touching the floor.
- Floor length: ends just above the floor for a tailored, modern finish.
- Puddle (minimal): extra length that rests on the floor. Cosy, but higher maintenance.
Step 4: Recess windows (inside the frame) need extra checks
If you are fitting inside a recess, measure the width and drop inside the frame and check clearance for handles and obstructions. Recess depth matters more than most people expect, especially for bulkier headers and some shade systems.
Step 5: Avoid the three classic measuring traps
- Using a soft tape: a metal tape measure is more reliable and less likely to stretch.
- Measuring the window, not the setup: measure the pole/track width and the planned drop from where it will hang.
- Forgetting light gaps: narrow curtains look “stingy” and let light spill at the sides. Fullness fixes both.
Quick finish checklist
- Write down width and drop in one note (per window).
- Pick fullness (1.5x or 2x) and keep it consistent within a room.
- Decide the finish style (sill, apron, floor) before buying.
Measure like this once, and the rest becomes simple: you are not buying “curtains,” you are building a calm frame for light and privacy.