What Denim Range Planning Is and Why It Pays
A range plan is a written answer to four questions: what will we sell, to whom, at what price and how many of each. It is also the document that stops a collection from drifting into thirty one-off styles that no customer can navigate and no factory can make efficiently.
Denim rewards planning more than most categories because the cost of changing course is high. Fabric is bought weeks before cutting, washes are developed through several rounds and the minimums attached to each fabric and colour push you to commit early. A plan that reuses fabrics across styles lowers risk, which is the core idea behind building a denim range from one fabric. A plan that scatters fabrics across many styles raises cost and leaves odd quantities in stock.
Core Versus Fashion Denim
Core denim styles are the ones customers ask for by name: a mid-rise straight in a classic indigo wash, a slim in black, a relaxed fit in a light wash. They sell in every season, carry over with small changes and let you reorder with confidence. Fashion denim is the seasonal layer: a new silhouette, an unusual wash, a surface treatment or a colour that reflects the moment. It creates newness and press interest, but it carries more risk of ending on markdown.
The right split depends on your brand and cash. A young label with limited capital usually leans to core, since it earns margin on repeat and keeps minimums reasonable. A fashion-led label may lean to seasonal but should still hold a base of core pieces so the customer finds something familiar. A useful discipline is to give each style a job: traffic builder, margin earner, hero or test.
- Core carry-over50%
- Seasonal updates30%
- Test styles10%
- Hero or statement10%
The test tier deserves a clear rule. Keep test styles to the smallest quantity your supplier will run, and decide in advance what result would earn them a reorder. The cautious route is described in test and scale manufacturing.
The Fits by Washes Grid
The fits-by-washes grid is the simplest planning tool in denim. List your fits down the side and your washes across the top, then mark which combinations you will make. It shows at a glance whether the range is balanced, whether one fit dominates and how many washes you are committing to.
| Fit (example) | Dark indigo | Mid wash | Light wash | Black |
|---|---|---|---|---|
| Straight, mid rise | Core | Core | Seasonal | |
| Slim or tapered | Core | Seasonal | Core | |
| Wide-leg or baggy | Seasonal | Hero | Test | |
| High-rise straight | Core | Seasonal | Test |
Each filled cell is a style and colour with its own minimum. Twelve cells in a four-by-four grid can look modest, but each one needs a wash approved and its own order quantity. Keep the number of fits to what your customer can wear, using the jeans fit guide, and the number of washes to what you can control, using the guide to types of denim washes. A good rule is to share fabric across fits and to vary washes mostly on the fabrics you already hold.
Fabric Choices That Keep the Range Manageable
Fabric is the biggest planning lever. Every extra fabric adds a minimum, a development cost and a source of lead-time risk. A small range can often run on two or three fabrics: a rigid mid-weight core fabric, a stretch fabric for slimmer fits and a heavier or specialist fabric for a hero style. Read the denim fabric MOQ guide before deciding how many to carry, and compare stretch and rigid options in the stretch denim versus rigid denim guide.
Washes follow the same logic. A few well-controlled washes beat many that vary in shade from lot to lot. If you want a distressed or laser-finished piece, plan it as the hero and give it extra development time, as covered in the guide to laser and ozone denim finishing.
Quantity Logic: How Many of Each
Quantities are where plans most often fail, usually through optimism. A simple method keeps it honest.
- Estimate demand per style. Use last season's sell-through, pre-orders, waiting lists or wholesale intentions, and be conservative on anything new.
- Add a reorder cushion only for core. Fashion lines should not carry hope in the quantity.
- Check against minimums. If a style cannot reach the supplier minimum at a sensible demand, merge it into another colour or drop it.
- Split by size. Use your own history for the size curve. Do not copy another brand's curve. See grading and size charts and jeans size chart and measurement spec.
- Round to cartons. Packing configuration affects freight efficiency and handling.
Remember that minimums apply per style and colour, so a range of eight style-colour combinations at 500 pieces each is a very different commitment from the same eight at 1,500 each. Our explanation of MOQ in clothing manufacturing shows how these numbers are set.
Open to Buy: Checking the Plan Against Cash
Open to buy is the amount you can still commit to new stock after counting what you hold and what is already on order. In a small brand it works as a simple cash check: how much can we spend on this range and still meet rent, wages and the next season?
Take an illustrative example. A brand sets a buying budget of £60,000 for an autumn denim range. Core styles take £36,000 at landed cost, seasonal styles £15,000 and test styles £4,000. That leaves £5,000 uncommitted as a reserve for repeat orders or freight surprises. The reserve is not waste, because late changes and extra testing always appear. A plan that spends every pound at the start has no room to respond when a style takes off or a fabric arrives late.
Test the plan against margin, too. Use the jeans costing sheet guide to estimate landed cost and the wholesale and retail markup guide to check that each style reaches the target margin at the intended price.
The Buying Calendar, Built Backwards
The calendar is simple in principle. Start from the date goods must be in your warehouse and subtract each stage: transit, production, fabric, approvals, sampling and design. Realistic lead times vary by supplier and season, so use your supplier's figures. The bands below show an illustrative sequence for a main autumn delivery.
- Plan and brief (0–6 wks) range plan, fabric choice, briefs to supplier
- Develop and sample (6–16 wks) fit, wash and first samples, comments and revisions
- Approve and order (16–20 wks) pre-production sample, test reports, order and fabric booking
- Fabric and production (20–34 wks) fabric, cutting, sewing, washing, finishing
- Inspect and ship (34–40 wks) final inspection, packing, shipping and delivery
The most useful lesson from any calendar is that most of the time is used before bulk production starts. Delays in sampling or approval cannot be recovered in the factory, so protect the early weeks. The detailed timings appear in the denim production lead time guide and the jeans sampling process. Add shipping and customs, which are covered in importing jeans into the UK.
Worked Example: A Ten-Style Autumn Range
Imagine a small UK label planning ten denim styles for autumn. The plan below is invented to show the logic.
- Customer. Women and men aged 25 to 40 who buy jeans online and expect a good fit and a reliable wash.
- Fabrics. Two: a rigid 12 oz fabric and a stretch fabric at similar weight.
- Styles. Five core, three seasonal, one hero and one test, using three washes and one black.
- Quantities. Deepest on the two best core styles, minimum on the test style.
- Calendar. Brief in week 0, bulk order in week 20, delivery in week 40, with a three-week buffer.
- Review points. Sell-through at four and eight weeks, with a rule for markdowns and reorders.
The review points matter because the plan is not finished at delivery. Decide in advance when a slow seller will be discounted and when a quick seller will be reordered. Markdown planning and price ladders are discussed in the clothing pricing guide.
Carry-Over, Reorders and Learning From Last Season
The cheapest style to launch is one that already exists. Carry-over styles reuse approved patterns, washes and fabrics, so development time and risk are lower and the factory already knows how to make them well. Treat carry-over as an asset: keep a record of the approved sample, the wash recipe reference, the measurement spec and the final inspection result for every core style, and hand that file to the supplier at the start of each season.
Reorders need their own rules. A reorder of a core style should still be checked against the approved sample, because fabric lots and wash batches vary. Ask for a fresh test report and a short pre-production comparison rather than assuming the second run will match the first. Agree how long the supplier will hold fabric for you and whether a reorder can be made at the same minimum.
Finally, close the loop. At the end of each season, list every style with its quantity bought, quantity sold at full price, quantity discounted and returns. The pattern shows which fits and washes earn their place. Styles that sold out in four weeks tell you to buy deeper next time, and styles that needed heavy discounting tell you to shorten the list. A buyer who reviews this each season builds a plan that improves with every pass, and the skills involved are described in how to become a denim buyer.
Trend input belongs in the plan too, but as a small, controlled share. Look at the sources in how to research denim trends as a buyer, pick one or two ideas and give them to the seasonal and test tiers rather than the core.
Common Range Planning Mistakes
One more point: do not plan alone. Share the draft with your supplier early so they can flag minimums, fabric availability and wash capability. A factory that sees the plan in week two can solve problems that would otherwise appear in week twenty. The garment sampling process guide explains why early feedback matters so much.
Denim Range Planning with Ruhrose
Ruhrose supports denim range planning from the first fits-by-washes grid through development and production, working from Bangladesh with UK buyer support. We help you reduce fabrics, match washes to what the factory can control and build a calendar with realistic lead times. Production starts at 500 pieces per style and colour, so a ten-style plan can be tested without tying up large amounts of cash. Bring your draft grid and delivery date and start a product enquiry to review the plan together.