Design Automation Sizing

Flat Sketch to Size Chart: No Manual Calculation

Transform your technical flat sketches into complete, graded size charts automatically. No spreadsheets, no formulas, no manual calculations—just upload and export.

11 min read
For Designers
Technical fashion flat sketch of a dress with measurement annotation lines flowing to a digital size chart

The Manual Calculation Problem

Fashion designers spend hours manually calculating grade rules, filling spreadsheets, and cross-checking measurements. One formula error can cascade through the entire size range, causing costly production mistakes.

✏️ From Sketch to Spec Sheet in Minutes

Every garment starts as a sketch—whether it's a quick hand drawing, an Illustrator flat, or a CAD technical drawing. But turning that sketch into a production-ready size chart has traditionally required:

  • Manually measuring or estimating base dimensions
  • Setting up complex Excel formulas for grading
  • Calculating each size based on grade rules
  • Double-checking every number for errors
  • Formatting into a presentable spec sheet

Now, you can skip all of that. Upload your flat sketch and get a complete, graded size chart in minutes.

Collection of different flat sketch styles including t-shirt, pants, jacket, and dress with measurement points
The tool works with all common flat sketch styles and garment types

⚙️ How Automatic Sketch-to-Size-Chart Works

1

Upload Your Flat Sketch

Export your sketch from Illustrator, CAD, or scan your hand drawing. PNG and JPG work best. The cleaner the sketch, the better the results.

2

AI Identifies Garment & Measurement Points

The system recognizes your garment type and automatically identifies all relevant measurement points (chest, length, shoulder, sleeve, etc.).

3

Set Base Size & Grade Rules

Choose your base size (typically M) and customize grade rules. Use presets for US, EU, or Asian markets, or define your own increments.

4

Generate & Export Complete Size Chart

Instantly receive a fully graded size chart. Export to Excel, PDF, or copy directly into your tech pack.

Detailed diagram of a shirt flat sketch with all measurement points labeled A through Z
Automatic identification of standard measurement points on any flat sketch
Interface showing flat sketch upload with analyzing progress indicator
Simple upload interface analyzes your sketch in seconds

Automatic vs. Manual Calculation

Manual calculation crossed out replaced by AUTO badge showing time savings
Say goodbye to manual spreadsheet calculations

Manual Calculation

  • • 2-4 hours per style
  • • Error-prone formulas
  • • Tedious data entry
  • • Inconsistent formatting
  • • Hard to modify later

Automatic Generation

  • • 2-5 minutes per style
  • • Mathematically accurate
  • • Zero data entry
  • • Professional formatting
  • • Easy adjustments
Complete grading table output showing base size with grade rules and all size measurements
Complete graded size chart generated automatically from your sketch
Export menu showing PDF, Excel, PNG, and CSV format options with download buttons
Export to any format that fits your workflow
Fashion designer at desk using tablet with size chart tool, flat sketches visible on desk
Designers can focus on creativity while the tool handles technical sizing

💡 Pro Tips for Best Results

Use High-Contrast Sketches

Black lines on white background work best. Avoid gray or colored backgrounds that might confuse edge detection.

Keep Proportions Accurate

Even stylized flats work, but more accurate proportions yield better measurement predictions.

Include Front & Back Views

For complex garments, uploading both views helps the AI understand construction details better.

Review & Adjust Base Size

Always verify the base size measurements before generating the full grade. Small adjustments here affect all sizes.

Stop Calculating, Start Creating

Upload your flat sketches and get production-ready size charts in minutes. Free to try.

Upload Your First Sketch

No credit card required • Works with any sketch format

Frequently Asked Questions