
Womenswear Fit Grading & Size Specification Assistant
Generate precise womenswear size grades and fit specifications using industry standards
What You Can Do
You can generate detailed size grade specifications that maintain your design intent across all sizes while accounting for fabric type, garment construction, and target market proportions. The skill produces measurement specs (bust, waist, hip, length, armhole, inseam), calculates appropriate ease allowances, creates grade rules from a single base size, and generates technical pack specifications ready for your patternmaker. This eliminates guesswork in sizing and identifies potential fit issues before sampling.
Features
Automatically calculate incremental measurement increases across sizes while preserving design proportions
Generate detailed specs for bust, waist, hip, length, armhole, inseam, sleeve length, and neckline measurements
Determine appropriate ease based on fabric type, garment category (fitted, semi-fitted, relaxed), and target market
Expand a size 6 (or any single size) into a full range with mathematically consistent proportions
Produce specs in industry-standard layout ready for patternmakers and production teams
Identify potential fit problems across sizes before sampling occurs
Analyze why samples fit inconsistently by comparing against standard grade rules
Input target demographic measurements to ensure grades accommodate your customer base
Example Output
Example 1: Grade Rule Output
Bust Grade: +1.0" per size (XS to S, S to M, M to L, L to XL, XL to 2XL)
Waist Grade: +0.875" per size
Hip Grade: +1.125" per size
Length Grade: +0.5" per size (XS-XL), +0.75" (XL-2XL)
Armhole Depth: +0.25" per 2 sizes
Example 2: Size Specification Sheet (Size M)
Bust: 37.5" | Waist: 29.5" | Hip: 40.5"
Shirt Length: 27.5" | Sleeve Length: 31.75"
Armhole Depth: 8.5" | Neckline Width: 5.25"
Ease Applied: +2" (bust), +1.5" (waist), +2.25" (hip)
Example 3: Fit Analysis Alert
- ⚠️ Flag: Hip grade increases 1.125"/size but armhole stays constant—may create proportion issues in sizes XL+. Recommend +0.125" armhole depth increase per size to maintain proportional fit.
What's Included
- SKILL.md instruction file with grading methodology and use cases:
- Size Grade Specification Template: Blank measurement sheet for your base size and target range
- Grade Rule Calculation Worksheet: Systematic approach to determining ease and incremental increases
- Industry Standard Reference Chart: ASTM D5585 and ISO 3635 baseline measurements by size
- Technical Pack Format Guide: Industry-standard layout for communicating specs to patternmakers
Who It's For
- Womenswear designers developing new collections and establishing fit consistency
- Tech packs/specification writers documenting measurements for production
- Pattern graders implementing sizing strategies from design intent
- Production managers coordinating between design and manufacturing
- E-commerce merchandisers creating accurate size guides and fit guidance
Best For
- Creating size grade specifications for new collections or line extensions
- Establishing measurement specs when onboarding new suppliers or factories
- Developing size guides for retail or e-commerce platforms
- Grading from a single base size across a full range (XS–3XL)
- Auditing why production samples fit inconsistently across sizes
- Documenting fit standards for internal design team alignment
- Adjusting grades in response to fabric changes or market feedback







