Short Answer (Citable)

Size Standards Supported by Ginwen

Ginwen develops patterns in the sizing system of your target market. The most common systems for custom down jackets are US, EU, UK, and Asia sizing, and each has its own measurement conventions and fit expectations. The factory does not assume one system fits all; the pattern is built to the standard you specify.

Within each system, the specific measurements are set by your size chart. Two brands selling in the US may use different size charts, and the pattern is graded to your chart rather than to a generic industry average. Your chart is the source of truth for grading and fit.

If your brand sells into multiple regions, each region can be treated as a separate size run. Many brands develop one style with a US size run and an EU size run, or a single run with an EU-leaning fit that works for both, and the decision is documented before sampling so the pattern is built correctly the first time.

How Size Grading Works

Size grading is the process of scaling a base pattern into a full range of sizes while keeping the garment's proportions correct. Grading is not simple enlargement; different parts of the garment grow at different rates, and the grade rules encode how the body changes between sizes.

1. The base size is developed and fitted, typically a middle size such as US M or EU 50
2. Grade rules are applied to expand the pattern up and down the size range
3. Key measurements are checked across the run: chest, waist, sleeve length, body length, and shoulder
4. Fit samples are produced in multiple sizes and measured against the size chart
5. Adjustments are made where the graded pattern drifts from the intended measurements

Down jackets have grading considerations that regular garments do not: baffle widths, fill distribution, and the relationship between the outer shell and the lining all change across sizes. A well-graded down jacket keeps the baffle proportions and fill placement consistent so the garment looks and performs the same in every size.

The grade rule set is part of the technical package and is kept on file for reorders. When a style repeats, the pattern and grade rules are reused, which is why repeat orders are faster and more consistent than first orders.

Market-Specific Fit Adjustments

Body shape expectations differ by market, and fit is about more than the numbers on a size chart. A garment can measure correctly and still fit poorly if the pattern was built for a different body shape distribution. Market-specific adjustments address this.

• Shoulder width and slope differ between populations; patterns are adjusted to the target market's typical proportions
• Body length and sleeve length are proportioned to the market's average height and arm length
• Waist and hip relationships differ, affecting how the jacket sits on the body
• Fit preference matters: US buyers often expect a relaxed fit in outerwear, while EU buyers often expect a closer cut
• Layering allowance is adjusted for the garment's intended use, from a slim city jacket to a roomy alpine parka

These adjustments are made during pattern development, before sampling, based on the fit brief you provide. The brief should state the target fit in plain terms: relaxed, regular, or slim; worn over a t-shirt or over a heavy knit; and the reference garment if you have one.

If you do not have a fit brief, Ginwen's pattern team works from the size chart and product type to propose a standard fit for the target market, and the first sample is the point where you correct it. The 7 to 14 day sampling round includes one revision round in most cases, which is usually enough to lock the fit.

What Sizing Data You Should Provide

The accuracy of the size run depends on the quality of the input. The more complete your sizing data, the fewer sampling rounds and the faster the development. The checklist below covers what Ginwen needs to grade and fit a style correctly.

• Size chart: measurements for each size in the run, including chest, waist, hip, shoulder, sleeve, and body length
• Target fit: relaxed, regular, or slim, and the intended layering underneath
• Reference garment: a sample jacket or a similar garment to match the fit and proportions
• Size range: the full range of sizes to be produced, such as XS to XXL or EU 46 to 58
• Grade preferences: any specific grading rules your brand uses, if you have them
• Measurement tolerances: acceptable deviation per measurement point, if your brand specifies them

If your size chart uses point-of-measurement conventions different from the factory's, the chart is converted and the conventions are confirmed in writing before grading. Measurement convention mismatches are the most common cause of size disputes in apparel, and confirming them early eliminates the whole class of problems.

For startup brands without a formal size chart, Ginwen can propose a standard chart for the target market based on the product type and intended customer, which you then adjust. Starting from a proposed chart is faster than building from zero, and the first fit sample validates the choice.

It is worth investing time in the size chart before sampling, because changing the chart after the pattern is graded means re-grading every size. A chart that is correct at the start costs one sampling round; a chart that changes late costs several, plus the delay.

Sampling and Fit Verification

Fit is verified on samples, not on paper. Ginwen produces fit samples in the base size first, and for larger programs, samples in multiple sizes so the grading can be checked across the run. The standard sampling window is 7 to 14 days per round, depending on complexity.

When the fit sample arrives, measure it against your size chart rather than relying on how it looks. Check chest, waist, shoulder, sleeve, and body length at each size, and test the ease by trying the garment over the intended layering. Written feedback with measurements is far more effective than general comments like "too big".

Fit adjustments are made on the pattern, not by taking in seams on the sample. Pattern corrections carry through the whole size run; seam adjustments fix only one garment. This distinction is why the pattern team, not the sewing team, handles fit revisions.

MOQ, Size Ratios, and Reorders

Size standards affect production planning through the size ratio: the proportion of each size within the order. Ginwen's MOQ is 50 pieces per style, and within that minimum, sizes can be mixed according to your ratio. Small sizes can be produced in lower quantities than core sizes, subject to practical minimums per size.

• MOQ applies per style, not per size, so a 50-piece order can cover a full size run
• Size ratios are set at order confirmation and can be adjusted between seasons based on sell-through data
• Grading and pattern files are stored for reorders, so repeat production starts from the approved pattern
• Fit data from previous seasons is used to refine the pattern before the next run
• Mixed-market programs can combine size runs for different regions in one order

For a startup testing a new market, starting with a narrow size range is usually smarter than covering every size. A range of four to five core sizes at 50 pieces per style lets you validate fit and demand with a contained investment, then expand the range on the reorder once the pattern files are already graded.

Reorders benefit from the stored pattern and grade rules: the second run of the same style skips the development phase and goes straight to production planning, which shortens the schedule and reduces the cost per piece.

Common Fit Problems and How They Are Avoided

Cross-market sizing fails in predictable ways, and most of them are preventable with the right development process. Knowing the common problems helps you brief the factory correctly and review samples effectively.

1. Relabeling: taking a pattern built for one market and changing the size labels without adjusting the pattern; the fix is building the pattern to the target market's chart from the start
2. Measurement convention mismatch: using different point-of-measurement rules; the fix is confirming conventions in writing before grading
3. Ignoring layering: designing a fit that does not account for the garment worn underneath; the fix is a fit brief that states the layering
4. Grading drift: the graded sizes drifting from the chart at the extremes of the range; the fix is multi-size samples before bulk
5. Fit feedback without measurements: vague revision comments that cannot be translated into pattern changes; the fix is written measurement feedback

Ginwen's development process addresses each of these by design: patterns are built to your chart, conventions are confirmed in writing, the fit brief is part of the tech pack, multi-size samples verify grading, and revisions are documented with measurements.

The result is a size run that fits the target market consistently from XS to XXL, verified on samples before production and repeatable on reorders from the stored pattern files. That consistency is what turns a good style into a successful product line in a new market.