# What is Grain Line?

> The grain line is the direction of the lengthwise threads in a fabric, parallel to the selvedge.

Source: https://prernaas.shop/glossary/grain-line

Last updated: 2026-10-28

- Category: Construction

The grain line is the direction of the lengthwise threads in a fabric, parallel to the selvedge.

## In more detail

Pattern pieces are placed along the grain line so the garment hangs straight and does not twist. Cutting off-grain makes seams twist and hems hang unevenly.

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