Flat knitting is a method for producing knitted fabric

Knitted fabric

Knitted fabrics is the third major class of fabric, after woven and nonwoven fabrics.-Elasticity, thickness and warmth:Compared to the other two classes, knitted fabrics are much more elastic, which accounts for their historical use in stockings and other clothing that requires changes in shape...

s in which the work is turned periodically, i.e., the fabric is knitted from alternating sides. The two sides (or "faces") of the fabric are usually designated as the right side (the side that faces outwards, towards the viewer and away from the wearer's body) and the wrong side (the side that faces inwards, away from the viewer and towards the wearer's body).

Flat knitting is usually contrasted with circular knitting

Circular knitting

Circular knitting or knitting in the round is a form of knitting that creates a seamless tube. When knitting circularly, the knitting is cast on and the circle of stitches is joined. Knitting is worked in rounds in a spiral. Originally, circular knitting was done using a set of four or five...

, in which the fabric is always knitted from the same side. Flat knitting can complicate knitting somewhat compared to circular knitting

Circular knitting

Circular knitting or knitting in the round is a form of knitting that creates a seamless tube. When knitting circularly, the knitting is cast on and the circle of stitches is joined. Knitting is worked in rounds in a spiral. Originally, circular knitting was done using a set of four or five...

, since the same stitch (as seen from the right side) is produced by two different movements when knitted from the right and wrong sides. Thus, a knit stitch (as seen from the right side) may be produced by a knit stitch on the right side, or by a purl stitch on the wrong side. This may cause the gauge

Gauge (knitting)

In knitting, the word gauge is used both in hand knitting and machine knitting; the latter, technical abbreviation GG, refers to "Knitting Machines" fineness size. In both cases, the term refers to the number of stitches per inch, not the size of the finished garment...

 of the knitting to vary in alternating rows of stockinette fabrics

Basic knitted fabrics

A few types of knitted fabric are so fundamental that they have been adopted as part of the language of knitting, similar to techniques such as yarn over or decrease...

; however, this effect is usually not noticeable, and may be eliminated with practice (the usual way) or by using needles of two different sizes (an unusual way).

In flat knitting, the fabric is usually turned after every row. However, in some versions of double knitting

Double knitting

Double knitting is a form of knitting in which two fabrics are knit simultaneously with two yarns on one pair of needles. The fabrics may be inseparable, as in interlock knitted fabrics, or they can simply be two unconnected fabrics...

 with two yarns and double-pointed knitting needles

Knitting needle

A knitting needle or knitting pin is a tool in hand-knitting to produce knitted fabrics. They generally have a long shaft and taper at their end, but they are not nearly as sharp as sewing needles. Their purpose is two-fold...

, the fabric may turned after every second row.

In Industrial Knitting applications, the terms "Flat" and "Circular" have very different meanings to those given above. A "Flat" or Vee Bed knitting machine consists of 2 flat needle beds arranged in an upside-down "V" formation. These needle beds can be up to 2.5 metres wide. A carriage, also known as a Cambox or Head, moves backwards and forwards across these needle beds, working the needles to selectively, knit, tuck or transfer stitches. A flat knitting machine is very flexible, allowing complex stitch designs, shaped knitting and precise width adjustment. It is, however relatively slow when compared to a circular machine. The two largest manufacturers of industrial flat knitting machines are Stoll of Germany, and Shima Seiki of Japan. But the pionear of flat knitting machine is MATSUYA, Japan.