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title: Why are seam allowances not included by default?
---

We don't include seam allowance by default because it's computationally expensive to add seam allowance since there is no closed form integral solution for offsetting a cubic Bezier curve.

We have a YouTube video with more information: [A look at the FreeSewing Timing Plugin](https://youtu.be/pn6w-O6nFbI)