4 Ply Wool vs DK Yarn: Can You Substitute and How
Sullivans International
â˘4 min read
4 ply wool and DK (double knitting) yarn are two common yarn weights used in knitting and crochet. 4 ply is thinner (about 28 g per 100 m); DK is thicker (about 50 g per 100 m). Whether you can use 4 ply instead of DK depends on gauge and your willingness to swatch and adjust needle size or pattern.
This guide explains the difference between 4 ply and DK, when substitution is possible, and how to keep gauge consistent.
4 ply wool is a fine yarn made from four strands twisted together. It is thinner than DK and sits in the #2 Fine to #3 Light range. 4 ply is often used for socks, baby clothes, lace, and lightweight garments where stitch definition matters.
DK (double knitting) yarn is a lightweight yarn in the #3 Light category. It is slightly thicker than 4 ply (~50 g per 100 m) and gives a slightly thicker, looser fabric. DK is used for sweaters, shawls, baby clothes, and accessories.
| Aspect | 4 Ply | DK |
|---|---|---|
| Weight per 100 m | ~28 g | ~50 g |
| Thickness | Thinner | Thicker |
| Fabric | Denser, finer | Slightly looser, fuller |
| Typical use | Socks, lace, delicate | Sweaters, shawls, general |
| Needle size (US) | 2ďż˝? | 5ďż˝? |
Yes, in many casesâif you check gauge and adjust. Substitution works when:
Important: Gauge = stitches and rows per inch. If you substitute 4 ply for DK without changing needle size, you will get more stitches per inch and a smaller, denser result. Always swatch, measure, and then adjust needle size or pattern so the finished size matches.
4 ply and DK are different weights: 4 ply is thinner (~28 g/100 m), DK thicker (~50 g/100 m). You can use 4 ply instead of DK by swatching, matching gauge (often with larger needles), and accepting a finer fabric. Always swatch and adjust so the finished piece matches your expectations.
No. 4 ply is thinner (~28 g per 100 m); DK is thicker (~50 g per 100 m). They produce different gauges and fabric density.
Yes, if you swatch and get the same gauge (often by going up a needle size or two). Expect a finer fabric and possibly more metres of yarn.
Gauge (stitches per inch) determines finished size. Different yarn weights change gauge; adjusting needle size or pattern keeps the size and fit correct.
This article is part of our yarn knowledge series, offering practical insights into yarn weights, substitution, and gauge for knitters and crocheters.