Garment and grading setup
Measurement grading rules
| Measurement | Base value | Below-base increment | Above-base increment | Percent / size | Pattern piece | Front / Back | Action |
|---|
Pattern point grading
| Point | Pattern piece | Base X | Base Y | X increment | Y increment | Direction note | Action |
|---|
Generated grading chart
Pattern point coordinates
Understanding Pattern Grading Charts
Pattern grading converts one approved base pattern into a coordinated family of sizes. A grading chart records how important measurements change between sizes. It gives pattern makers, technical designers, sample rooms, and factories one consistent reference. The process usually begins with a base size that has already been fitted. Each measurement then receives a grading rule. That rule may add or subtract a fixed amount, use a percentage, or follow a custom specification. A clear chart reduces errors because every size follows the same documented logic.
How This Generator Works
This generator lets you define size labels, a base size, units, garment details, and grading methods. You can add common measurements such as bust, waist, hip, shoulder, sleeve length, inseam, rise, and hem. Each row can use different increments above and below the base size. This is useful because many real grading systems are not perfectly symmetrical. The tool also includes pattern point grading. X and Y coordinate increments can show how specific pattern points move between sizes. After generation, the completed chart highlights the base size and displays calculated measurements for every selected size.
Using Grade Rules Carefully
Grading rules should reflect the garment type, target customer, fabric behavior, and intended fit. A fitted woven garment may require different increments from a relaxed knit style. Children, petite, tall, and extended-size ranges may also need separate rules. Always verify generated measurements against an approved specification or physical sample. Pattern grading changes size, but it does not automatically correct fit problems in the original base pattern. Designers should review balance, ease, proportions, seam relationships, and construction details before production.
Typical Grading Reference
| Measurement area | Common grading approach | Check before production |
|---|---|---|
| Bust / Chest | Fixed circumference increment | Ease and armhole balance |
| Waist | Fixed or category-specific increment | Waist placement and shaping |
| Hip | Fixed circumference increment | Seat ease and side seam shape |
| Shoulder | Small horizontal increment | Neck and sleeve relationship |
| Sleeve length | Small vertical increment | Cuff placement and sleeve pitch |
Practical Workflow
Start with a reliable base pattern and confirm its measurements. Enter the required size range and identify the base size exactly. Add only the measurements that matter for the garment specification. Use separate increments when growth below the base differs from growth above it. Generate the chart, inspect unusual jumps, and compare key sizes with your technical specification. Export the final chart to CSV for spreadsheet work or PDF for sharing. Save JSON when you want to reuse the same grading rules later.