| Yarn Weights | Suggested Needle Size | Suggested Hook Size | Stitches Per Inch | Wraps Per Inch (WPI) | Yards per 100g | Common Uses |
 |
0 - 2 US |
Steel: 6,7,8 Regular: B-1 |
Knit: 7-8 Crochet: 8-10.5 |
18+ | 650 - 875 | Lace Knitting, Crochet |
 |
1 - 3 US | B-1 to E-4 |
Knit: 6-7 Crochet: 5-8 |
16 | 440 - 525 | Socks & Lightweight Garments |
 |
3 - 5 US | E-4 to 7 |
Knit: 5-6 Crochet: 4-5 |
14 | 330 - 440 | Light Sweaters, Baby Items & Accessories |
 |
5 - 7 US | 7 to I-9 |
Knit: 5 Crochet: 3-4 |
13 | 260 - 328 | Sweaters, Scarves, Soft Hats |
 |
7 - 9 US | I-9 to K-10.5 |
Knit: 4-5 Crochet: 3-3.5 |
10-12 | 220 - 260 | Sweaters, Outdoor Wear, Blankets, Scarves, Mittens, etc. |
 |
9 - 11 US | K-10.5 to M-13 |
Knit: 4 Crochet: 2-3 |
10 | 120 - 140 | Rugs, Blankets, Warm Outerwear |
 |
11 & Up US | M-13 & Up |
Knit: 3-4 Crochet: 2 |
9 - 10 | 70 - 110 | Heavy Blankets, Sweaters, Rugs, Tapestries |
