Plan circle-skirt seam and cut geometry and check a conservative single-piece fabric envelope.
Your input
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Result
Enter your data or use the example, then run the tool.
Worked example
Waist 20π cm, no ease and full circle gives radius 10 cm; length 50 gives outer seam radius 60 before allowances.
Method
Waist radius = (waist + ease) / sector angle. Add skirt length along the seam line, subtract waist allowance at the inner cut and add hem allowance outside.
Limits
SVG is a diagram, not a certified full-scale pattern. Partial-circle side room is conservatively rectangular, not optimized nesting or guaranteed fit.
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