Unstitched suits · 8 October 2026 · 3 min read
What is the grain of fabric? Lengthwise and crosswise
What is fabric grain? The lengthwise warp and crosswise weft threads, known as tana and bana, how to find the grain on a piece of cloth and why pieces follow it.
InspirationGrain in one sentence
Grain is the direction of the threads in a woven fabric: the lengthwise grain follows the warp threads, parallel to the selvedge, and the crosswise grain follows the weft threads from one edge to the other.
On a loom the warp threads are stretched tight along the length and the weft is passed over and under them, row after row. In Urdu these are the tana (warp) and the bana (weft), which is why tana bana is also used figuratively for the woven fabric of something, such as a family or a story. A tailor talking about grain is talking about which way those threads run in each piece of a garment.
Three directions, three behaviours
The same cloth behaves differently depending on which way you pull it. Patterns carry a straight arrow, the grainline, so each piece can be laid parallel to the selvedge.
- Lengthwise grain (straight grain): the firmest direction, with very little stretch. Most garment pieces run their length along it so they hang straight.
- Crosswise grain (cross grain): a little more give. Pieces are sometimes turned this way to fit a border or a wide panel across the cloth.
- Bias: the diagonal, with the most stretch and drape; our article on what cut on the bias means explains where it is used.
How to find the grain on a piece of cloth
With a full width of fabric this is easy, because the selvedges run along the lengthwise grain. With an offcut or a pack piece it takes a little more looking. None of these checks needs anything more than your hands and good light.
- Find a selvedge if there is one: the lengthwise grain runs beside it.
- Look closely at the weave in daylight; on most plain and printed cottons you can follow a single thread.
- Pull one crosswise thread gently near a cut end; the line it leaves shows the true cross grain.
- Fold the cloth in half lengthwise, selvedges together; if the cut ends do not line up, the cloth was cut or printed off grain.
- Pull gently along each direction and compare the give: the lengthwise grain should feel the firmest.
Why pieces are laid along it
A piece cut on grain hangs straight, keeps its shape and behaves the same on both sides after washing. A piece cut slightly off grain may hang to one side, and its side seams can drift round the body over time, one reason a kameez sometimes twists after a few washes. Our article on how fabric changes fit and drape goes further.
Prints add a complication. Some fabrics are printed slightly off the grain, so following the threads makes the pattern look crooked and following the pattern puts the threads askew. A tailor has to choose, and usually favours the print on a front panel where it shows most.
What it means when you send fabric
Cutting on grain sometimes needs a little more fabric than squeezing pieces in at angles, so do not trim or cut your fabric before sending it. Our guide to checking you have enough fabric shows how to measure it. With Stitching Only we confirm suitability and quantity before you post anything, and a photo of the whole length, laid flat, helps us see the print and the edges. Ask for a stitching-only quote; the stitching glossary explains other tailoring words you may meet in it.
Common questions
What does off grain mean?
It means the threads in a piece are not square to each other, or the piece was cut at a slight angle to them. An off-grain garment may hang unevenly or have seams that drift round the body after washing.
Which direction stretches most in woven fabric?
The bias, the diagonal between the two grains, stretches most. The crosswise grain usually has a little more give than the lengthwise grain, which is the firmest.
Can a border run across the grain?
Yes. Many printed and embroidered borders run along the selvedge, while others are worked across the width. The tailor plans the cut around where the border sits, which is one reason photos of the whole fabric are useful.
