Most emerging designers find out whether their collection is commercially viable the expensive way: after the samples are cut, the line sheet is out, and a buyer passes without explaining why. Buyers rarely explain why. They do not have time, and the reasons are usually unglamorous.
Here is what they are actually looking at.
1. Your margin does not work
The single most common failure. If your cost per unit is $48 and your wholesale price is $72, your retailer needs to sell at roughly $144–$180 to hit their own margin. If that number is wrong for your category, no amount of beautiful product fixes it. Work the arithmetic backwards from the retail shelf price, not forwards from your costs.
2. Your minimums are impossible
A boutique testing a new designer wants to buy small — often two or three units per style across a short size run. If your manufacturer's minimum is 100 units per colourway, you cannot service a first order, and the buyer knows it before they ask. Have an honest answer ready about what you can produce at low volume and at what price.
3. You cannot state a lead time
“About two months” is not a lead time. Buyers plan delivery windows months out and will not risk a hole in the floor plan on a vague answer. Know your production calendar in weeks, know your fabric lead time separately, and build in the slippage you know will happen.
4. The size range is too narrow
A four-size range built on one fit model limits a buyer's sell-through before the order is even placed. Graded patterns across a credible range matter more than an extra style.
5. Everything is a statement piece
Runway collections reward the extraordinary. Retail rewards a mix. A line sheet of twelve dramatic pieces and nothing wearable gives a buyer no entry point. The pieces that pay for your business are usually the quiet ones next to the loud ones.
6. There is no clear category
Buyers shop by department. If a buyer cannot tell within five seconds whether you are contemporary, advanced contemporary, ready-to-wear or occasion, they cannot work out which budget line you come out of, and they move on. Pick a lane and price inside it.
7. Your care, content and labelling are incomplete
Fibre content, country of origin, care instructions and a consistent size label are legal and practical requirements, not finishing touches. A sample without them signals that production has not been thought through.
8. You have no sell-through story
If you have sold anything — direct to consumer, a pop-up, one stockist — you have data, and data de-risks you. Which style sold first. Which size ran out. What the return rate was. A designer who can say “this style sold through at 80 percent in three weeks” is in a different conversation from one who cannot.
9. Your line sheet is a mood board
A line sheet is a working document: flat image, style number, name, fabric content, colourways, size range, wholesale price, suggested retail, minimum, delivery window. Not a lookbook. Buyers place orders off line sheets and they will not retype your information for you.
Fix them in this order
Margin first, because if the arithmetic does not work nothing else matters. Then minimums and lead time, because those determine whether you can accept an order at all. Then range and assortment. Then the paperwork. Styling and photography last — they are the cheapest to fix and the easiest to redo.
Critically: do this before you cut a full sample run. The cost of discovering a margin problem at the line-sheet stage is a weekend of spreadsheet work. The cost of discovering it after samples is the samples.
If you want an outside read
Designers are usually the worst judges of their own commercial readiness, which is why we built the Retail Readiness Report — a structured written assessment of your product or collection against the criteria above, delivered within 48 hours. It is $149, and it is designed to be read before you spend money on samples rather than after.
If the gap is in the selling rather than the product, Wholesale Ready covers the line sheet, the buyer approach and the follow-up sequence that turns interest into purchase orders.
SFWRUNWAY has worked with more than 1,300 emerging designers since 2016. Our next Los Angeles show is Saturday, November 14, 2026 — designer packages are here.