Size a square-flap envelope paper prototype around a card and download an SVG net.
Your input
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Result
Enter your data or use the example, then run the tool.
Worked example
A 100 × 150 mm card with 2 mm clearance needs a 104 × 154 mm pocket. Sample flaps produce a 144 × 313 mm net.
Method
Add clearance around the card to define the pocket. Check side glue space and combined flap overlap, then draw separate cut/fold groups.
Limits
One paper-prototype style only. Thick contents, stock thickness and adhesive behavior are not modeled. Postal-machine compliance is not established; test a physical sample.
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