According to Craft Yarn Council's Standard Yarn Weight System, DK weight yarn falls into the category 3-Light yarn weight, along with light worsted yarns. It is thinner than category 4-Medium yarns (a.k.a. worsted weight yarn) and heavier than 2-Fine yarns (a.k.a. sport weight yarn).
DK or Double Knitting This is a term that originated in Britain and is used by all types of manufacturers. It refers to a yarn size very close to a sport weight, but slightly heavier. The gauge is about 5 1/2 stitches per inch and is usually knit on a U.S. 6 needle.
Although DK is lighter than worsted, they are both considered to be medium weight yarns, and they're often used for the same kind of projects. You might be able to substitute one for the other, but always knit a gauge swatch first.
DK (Double Knit) is a light yarn, for example of 50 grams. DK yarns are thinner than Aran yarns and are often used for projects that require lightweight yarns, such as a summer sweater, cap, accessories or children's clothing.
Double knitting yarn is defined as an 8-ply thread that has between 11-14 wraps per inch resulting in around 200-250 meters per 100 grams. The recommended needle size is 3.75 – 4.5 mm to achieve a gauge range in stockinette stitches of between 21-24 stitches per 4 inches. You'll often find it abbreviated to DK.
So there's actually a really easy way to tell if your yarn. Doesn't have a label what weight it isMoreSo there's actually a really easy way to tell if your yarn. Doesn't have a label what weight it is simply take a knitting needle and start wrapping the yarn around the needle.
Sport weight yarn and DK (double knitting) weight yarn are often viewed as interchangeable, but they do have a slight difference. Sport weight yarn is a teeny bit lighter or finer than DK weight. Use these weights for mid-weight socks, accessories, shawls, wraps, and sweaters.
Yarn Weight & Crochet Hook Size Chart
|Yarn Weight Terms||Suggested Hook Size|
|0-Lace, Thread||(No. 1) 1.50 mm, (No. 2) 1.50 mm, (B-1) 2.25 mm, 2.50 mm|
|1-Super Fine||(C-2) 2.75 mm, (D-3) 3.25 mm|
|2-Fine||(E-4) 3.50 mm, (F-5) 3.75 mm|
|3-Light, Light Worsted||(G-6) 4.00 mm, (7) 4.50 mm, (H-8) 5.00 mm|
DK stands for “double knitting,” but in the case of DK yarn, it doesn't mean that you use it exclusively to create projects using the double knitted technique, nor does it mean that you hold two strands of it together to stitch it. ... This same Light category also includes some light worsted yarns.