Curtains and Roman shades need different measuring plans. Curtains are sized around a rod or track, the finished panel area, header, fullness, and floor relationship. Roman shades are sized around an inside or outside mount, the opening, frame depth, width, and height. Choose the product and installation method first, then follow its official guide.
The difference at a glance
| Decision | Custom curtains | Roman shades |
|---|---|---|
| Starting point | Planned or installed rod or track | Inside or outside mount |
| Main dimensions | Finished curtain width and length | Finished shade width and height |
| Installation context | Header, hardware position, panel stack, floor | Frame depth, trim, obstructions, opening |
| Coverage questions | Side coverage, center meeting point, floor relationship | Edge coverage, mount position, handle clearance |
| Official next step | Drapery measuring guide | Roman shade measuring guide |
This overview explains the workflow. It cannot replace the measurements, allowances, or product-specific instructions in the two detailed guides.
For curtains, plan the hardware before the fabric size
The rod or track establishes where the curtains begin, how far they travel, and where they stack when open. If hardware is not installed, decide its intended position relative to the window, ceiling, trim, furniture, switches, and vents.
Next choose the header because the measuring reference point can depend on how the panel connects to the hardware. Finished width and finished length are curtain dimensions, not simply the glass dimensions.
Also decide how the hem should relate to the floor or another endpoint. A small change in mounting position can change the final length, so measure from the planned or installed rod location.
Use the pre-order curtain measuring checklist to organize the decisions, then open Fredesigner's drapery measuring guide for the full sequence. Keep every numeric allowance attached to the header and installation scenario stated there.
For Roman shades, choose the mount first
An inside mount places the shade within the opening when the frame, depth, and hardware allow it. An outside mount positions the shade over or around the opening and changes the area that must be covered.
The mount choice determines what width and height mean. Record the points requested by the guide, note any unevenness, and check window handles, locks, tile, trim, cranks, and nearby walls.
Read Inside Mount vs. Outside Mount Roman Shades if the mount is not settled. Then use the Roman Shade Measuring Checklist and Fredesigner's official Roman shade measuring guide. A deduction, depth, or overlap from another brand or product may not apply.
Large windows need a layout decision before a number
A wide opening may need more than one panel, a different product configuration, or a hardware plan that supports daily operation. A tall opening can make reach and control choice more important.
Photograph the full wall and record nearby obstacles. If a window is unusually wide, tall, angled, shallow, or interrupted by hardware, identify the product you are considering and ask support about the configuration before placing a custom order.
Separate fit decisions from fabric decisions
Measurements answer where the treatment will sit and how much area it will cover. They do not answer how the color, weave, or opacity will look in the room.
If you are still choosing material, compare curtains or custom Roman shades before finalizing dimensions. Check the listed price and conditions for any sample-book option; treat it as free only when the public offer and price agree.
A final pre-order check
- The product type is final.
- The curtain header and hardware position are known, or the Roman shade mount is chosen.
- Measurements were taken from the references required by the correct guide.
- Trim, handles, furniture, vents, and floor clearance were considered.
- The selected product's size range, options, and instructions were reviewed.
- Unusual conditions were discussed with support before ordering.
Measure the installation you plan to build, not an abstract window. Once the product type, hardware, and mount are fixed, the official guide can turn those decisions into the correct order dimensions.
