A tie that spirals rather than hanging straight is the most common complaint in this trade, and it is almost never a fault in the tie you were sent. It is how it was cut.

The bias, and why it costs money

Woven cloth is stable along the warp and weft and stretchy on the diagonal. Cutting a tie at forty-five degrees puts that stretch along the length, which is what lets it knot evenly and hang straight.

Laying diagonal shapes on a rectangular roll wastes about a third of the cloth. That waste is the entire economic reason cheap ties are cut straight.

What an off-grain tie does

It pulls unevenly along its length as soon as it is worn, so the blade rotates. Within a few wears it hangs with a visible twist.

Pressing flattens it for an afternoon. The cloth’s grain has not changed, so the twist returns. There is no repair for this.

How to check a tie you already own

Look at the back. A bias-cut tie has a diagonal seam where two lengths are joined, because no roll is wide enough to cut a whole tie diagonally in one piece.

A tie with no diagonal seam, or with a seam running straight across, was cut on the grain.

The one honest exception

Knitted ties have no woven grain and no interlining at all, so the bias question does not apply to them. Everything else in a tie range should be bias cut without exception.