Some of use use the metric sizing while others use the US, England or even Japanese sizing, when they knit or crochet.
I have gathered metric and its corresponding in US sise here, to “speak” the same language and for them to be handy.
The sizes for knitting:
| Type of yarn | Metric | US |
| Lace | 1,5 | 000 |
| Lace | 1,75 | 00 |
| Lace | 2,00 | 0 |
| Lace | 2,25 | 1 |
| Superfine or Fingering | 2,5 | |
| Superfine or Fingering | 2,75 | 2 |
| Fine | 3,00 | |
| Fine | 3,25 | 3 |
| Fine | 3,5 | 4 |
| Sport or Light | 3,75 | 5 |
| Sport or Light | 4,00 | 6 |
| Aran or medium | 4,5 | 7 |
| Aran or medium | 5,00 | 8 |
| Aran or medium | 5,5 | 9 |
| Bulky | 6,00 | 10 |
| Bulky | 6,5 | 10 1/2 |
| Super Bulky/Worsted | 7,00 | |
| Super Bulky/Worsted | 8,00 | 11 |
| Jumbo | 9,00 | 13 |
| Jumbo | 10,00 | 15 |
| Super Jumbo | 12,5 | 17 |
| Super Jumbo | 12,75 | 17 |
| Super Jumbo | 15,00 | 19 |
| Super Jumbo | 19,00 | 35 |
| Super Jumbo | 25,00 | 50 |
| Super Jumbo | 35,00 | 70 |
The sizes for crochet:
| Metric | US |
| 2,25 | B-1 |
| 2,50 | |
| 2,75 | C-2 |
| 3,25 | D-3 |
| 3,5 | E-4 |
| 3,75 | F-5 |
| 4,00 | G-6 |
| 4,5 | G |
| 5,00 | H-8 |
| 5,5 | I-9 |
| 6,00 | J-10 |
| 6,5 | K-10 1/2 |
| 7,00 | |
| 8.00 | L-11 |
| 9.00 | M/N-13 |
| 10.00 | N/P-15 |
| 12.00 | |
| 15.00 | P/Q |
| 16.00 | Q |
| 19.00 | S |
| 25.00 | T/U/V |
| 30.00 | T/X |

























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