Why a screen image is never enough
Carpet colour and pile texture shift more than most other home finishes depending on the light source, the surrounding wall colour, and even the angle you view it from, because pile fibres catch and scatter light differently to a flat painted or tiled surface. A runner that looks warm and neutral in a product photo lit for an online catalogue can read distinctly cooler, pinker or greyer once it's sitting on your own stairs under your hallway's actual bulbs. This is the single biggest reason stair runner orders go wrong - not poor measuring, but a colour or pile texture that looked right on screen and didn't translate once it arrived. Requesting and properly testing a physical sample removes almost all of that risk for a very small amount of extra time.
What size and quantity of sample to ask for
For a solid or subtly textured colour, a standard swatch of roughly 6-12 in (15-30 cm) square is usually enough to judge the base colour and pile character. For any patterned weave - stripes, checks, herringbone, florals or a bordered design - ask for a larger sample if the retailer can provide one, ideally big enough to show at least one full pattern repeat, because a small swatch of a large-scale pattern can be genuinely misleading about how the motif will actually read once it's laid down a full flight of stairs. It's also worth requesting two or three colourway options at once rather than one at a time, since side-by-side comparison under the same light is far more reliable than judging one swatch in isolation and trying to remember it a week later when the next one arrives.
Ask for the actual dye lot
If possible, ask whether the sample comes from the same dye lot or batch that would supply your order. Carpet colour can vary slightly between production runs, and a sample from an older batch may not match a freshly woven order exactly.
Where and how to test the sample properly
- Lay the sample directly on a tread near the top, middle and bottom of the flight - light often differs noticeably along a staircase.
- View it in natural daylight, under your hallway's evening artificial lighting, and if possible under any skylight or landing window separately.
- Hold it against your stair wall colour, skirting board and any adjacent flooring to check it doesn't clash or disappear.
- Step back 6-10 ft (1.8-3 m) to see how the colour and pattern read at normal viewing distance, not just close up.
- Leave it in place for a few days if you can, since first impressions under one lighting mood can be misleading.
- Run a hand or sock across the pile to check texture and pile height feel underfoot, not just visual appearance.
How much runner do I need?
While you're waiting on samples is a good time to finalise your length calculation, so you're ready to order the moment you've chosen a colourway. For a straight run of 13 steps with a 10.5 in tread going and 7.25 in riser height, each step takes 10.5 + 7.25 = 17.75 in, times 13 steps = 230.75 in, plus roughly 24 in of top and bottom finishing allowance = 254.75 in, or about 21.2 ft. With a 5-10% waste margin added for cutting and any pattern matching, order closer to 22-23 ft.
In UK metric terms, the same flight with a 27 cm going and 18.5 cm rise needs 27 + 18.5 = 45.5 cm per step, times 13 = 591.5 cm, plus about 60 cm finishing allowance = 651.5 cm, or roughly 6.52 m, and with a 5-10% waste allowance that becomes about 6.8-7.2 m. Every staircase's tread going and rise differ, so run your own step count through a stair runner calculator to get an accurate figure, rather than reusing an example - a stair runner length calculator also makes it easy to see how much a small change in tread going shifts your total, which is useful once you're comparing a couple of different weaves with slightly different specified pile heights.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Open the stair runner calculatorSample size and turnaround by request type
| Sample type | Typical size sent | Typical turnaround | Usually free? |
|---|---|---|---|
| Standard swatch, solid colour | 6-12 in (15-30 cm) square | 3-7 days | Usually free |
| Larger pattern-repeat sample | 12-24 in (30-60 cm) square | 5-10 days | Often free, sometimes a small refundable fee |
| Cut length from your own order roll | Several feet/metres, on request | Varies, often at time of production | Sometimes chargeable |
If a retailer charges for samples, it's frequently refundable against a full order, so ask before assuming it's a sunk cost. A small sample fee is a reasonable trade for avoiding a full-length order in the wrong colour, which is a far more expensive and time-consuming mistake to correct.
What to do once you've chosen
Once a sample has passed the daylight-and-evening-light test and you've confirmed your length, ask the retailer to confirm the exact product code and colourway name in writing before you place the full order, since sample swatches are sometimes cut from a slightly different reference batch than the one that will actually be woven or shipped for your order. It's also worth asking whether your particular sample and your future order will come from the same dye lot, particularly for wool weaves where natural fibre dyeing can show subtle batch-to-batch variation. This small confirmation step, alongside a stair runner calculator check on length, is what turns a sample viewing into a confident, low-risk full order.
Still deciding on material, width or pattern? Our hub on stair runners compares weaves, widths, backings and fitting styles side by side, then hands the numbers straight to the calculator.
Frequently asked questions
Are stair runner samples usually free?
Standard swatches are commonly free or sent for a small refundable fee that's credited back if you go on to order. Larger pattern-repeat samples or cut lengths from an actual order roll are more likely to carry a small charge, so it's worth asking before requesting several.
How many samples should I request at once?
Two or three colourway or pattern options at a time is usually more useful than requesting one, viewing it, and then waiting for the next, because side-by-side comparison under the same lighting is far more reliable than judging swatches in isolation days apart.
Why does my sample look different once it's delivered as a full runner?
Colour and pile can shift subtly between production batches or dye lots, and lighting in a showroom or photography studio often differs from your own hallway. Asking whether your sample and full order share the same dye lot reduces this risk considerably.
How big a sample do I need for a patterned runner?
Ask for a sample large enough to show at least one full pattern repeat if the retailer can provide it, since a small swatch of a bold or large-scale pattern can be genuinely misleading about how the motif reads once laid down a full flight of stairs.
Should I test the sample in more than one room?
You should at minimum test it directly on the actual stairs in both daytime and evening lighting, since that's where it will live. Comparing it against your stair wall colour, skirting and any adjoining flooring in the same location is more useful than viewing it elsewhere in the house.
Can I get a sample cut from the exact roll that will supply my order?
Some retailers can do this on request, particularly for larger orders, though it's more often a chargeable service and takes longer to arrange than sending a standard stock swatch. It's the most reliable way to guarantee an exact colour and dye lot match.
How long does it usually take to receive a sample?
Standard stock swatches typically arrive within 3-7 working days. Larger pattern-repeat samples or bespoke cuts can take 5-10 days or longer, particularly if they need to be cut specifically for your request rather than sent from pre-cut stock.
What should I do if none of the samples look right once delivered?
Ask the retailer for further options rather than settling, and consider requesting a larger sample size if a small swatch made it hard to judge a pattern properly. It's far cheaper and less disruptive to keep testing samples than to reorder a full-length runner in the wrong colour or pattern.
Know your numbers in 30 seconds
Enter your step count, tread depth and riser height — the stair runner calculator gives you the exact length to order, in metres and feet, with waste included.
Confirm your length while you're waiting on samplesEvery guide is written from hands-on measuring and fitting experience, checked against the calculator’s own maths, and re-reviewed whenever prices or methods change. Read our editorial standards.