Why the gauge of the knitting machine appears in the product description

Short answer: Gauge tells how many needles stand per inch in the knitting machine. The number decides how small the stitches can be and so how fine the fabric can be knitted. High gauge gives a dense, smooth fabric, low gauge a coarser, more open one.

Needle density sets the limit

A machine with many needles in little space can only use thin yarn. A machine with few needles needs coarse yarn to fill the surface. The needles sit in a cylinder, and each needle forms one stitch in every row. That is why the number of needles sets a clear upper limit on how fine the fabric can be.

How to read the number

Gauge is given as the number of needles per inch. A high number means many needles close together, a low number few needles with space between. The number says nothing about how good the fabric is, only how fine it is knitted. It is a technical description of the machine.

Why the number says something about the fabric

High gauge means small stitches, a smooth surface and a thin, dense fabric. Low gauge means large stitches and a sturdier, more open fabric. You can therefore guess the character of the fabric before you touch it. See bamboo hoodies for women.

What the yarn has to do with it

Gauge and yarn are closely linked. Thin yarn needs a fine machine, and coarse yarn a coarse one. If thick yarn is used in a fine machine, the needles cannot form stitches and the fabric turns uneven. That is why machine and yarn are always chosen as a pair, so the fabric gets the character wanted.

What you can use it for

If the gauge is stated, you can guess the character of the fabric before you touch it. That is especially useful when you shop online and cannot feel the fabric. A high gauge points to a fine, dense fabric, a low one to a sturdier one. See bamboo loungewear for women.

Gauge and fit

A finely knitted fabric often drapes more smoothly and lies closer to the body, while a coarser fabric has more volume. That can affect how the garment sits, especially in a close-fitting cut. Feel the difference by hand if you can, and notice how the fabric falls.

High gauge is not always better

High gauge gives a finer fabric, but not necessarily a stronger one. A coarser fabric with thicker yarn can take more wear, while a very fine fabric can be more delicate. Choose by what you need the garment for, not only by the number. See women's long-sleeved bamboo T-shirt.

Why the number is not always there

The number is not always on the product page, only when the maker wants to highlight the fabric. If it is missing, look at weight, thickness and the fabric description instead. Ask the shop if you are unsure, and compare with a garment you already know.

How to use it in practice

Compare two garments in a similar fabric and see which has the higher gauge, if the information is there. Add weight and fit and you get an overall picture. Gauge is one of several numbers, not the whole answer. Use it as an aid when you choose.