I've been looking at a couple of crochet patterns that are in Japanese, from the Gosyo yarn company website. Their hooks have a different sizing system than US hook sizes. The first chart is a translation of recommended Japanese hooks for different weights of yarn. The second chart translates hook sizing in relation to US sizing.
Translated from Japanese Gosyo yarn company site.
Reference: ABCs of Japanese Knitting. The ABCs charts show translation of Japanese to English for yarn weights, fiber types, numerals, and knitting needle sizes. Very useful. Another useful site is Needleartsbookshop.com, where you find a document for interpreting Japanese Knitting Patterns. Terms like gauge, times, rows, & stitches are interpreted, and there is a list of resources.
| crochet hooks (in Japanese sizes) | ||||||||||
| weight | 3/0 | 4/0 | 5/0 | 6/0 | 7/0 | 8/0 | 10/0 | 7mm | 8mm | 10mm |
| 2-ply lace | • | |||||||||
| 3-ply | • | • | ||||||||
| 4-ply finger | • | • | ||||||||
| sport | • | • | ||||||||
| sport/dk | • | • | • | |||||||
| dk | • | • | ||||||||
| bulky | • | • | • | |||||||
There's a note here that most of the patterns on the Gosyo site use the aluminum hooks sizing.
| US size approx. | Letter | B | B/C | C/D | E | G | H | J | L | N | ||
| Thickness | 2.25mm | 2.25mm 2.75mm | 2.75mm 3.25mm | 3.5mm | 4.0mm | 5.0mm | 6.0mm | 8.0mm | 10.0mm | |||
| US steel | No. | 4/3 | 2 | 1 | 0 | 00 | ||||||
| Thickness | 2.0mm 2.1mm | 2.25mm | 2.75mm | 3.25mm | 3.5mm | |||||||
| UK size | No. | 14 | 14/13 | 13 | 11 | 9 | 8 | 6 | 4 | 2 | 0 | 000 |
| Thickness | 2.0mm | 2.0mm 2.5mm | 2.5mm | 3.0mm | 3.5mm | 4.0mm | 5.0mm | 6.0mm | 7.0mm | 8.0mm | 10.0mm | |
| aluminum international standard | No. | 2/0 | 3/0 | 4/0 | 5/0 | 6/0 | 7/0 | 8/0 | 10/0 | 7mm | 8mm | 10mm |
| Thickness | 2.0mm | 2.3mm | 2.5mm | 3.0mm | 3.5mm | 4.0mm | 5.0mm | 6.0mm | 7.0mm | 8.0mm | 10.0mm | |
| bamboo Japanese standard | No. | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 10 | |||
| Thickness | 2.7mm | 3.0mm | 3.3mm | 3.6mm | 3.9mm | 4.2mm | 4.5mm | 5.1mm |

2007-12-23 03:10 am (UTC)
2007-12-23 07:57 pm (UTC)
http://www.needleartsbookshop.com/Japan
celpjefscycle
(Anonymous)
2008-01-12 12:04 am (UTC)
many interesting things
Celpjefscylc
2008-02-17 03:26 am (UTC)
Japanese Sizing
(Anonymous)
2008-07-28 09:58 pm (UTC)
Loretta
2008-10-18 03:55 pm (UTC)
For the 2/0 hook the US steel hook #4 is a match (2.0mm).
And since I'm commenting anyway, US steel #2 matches US aluminum B, #1 matches C, #0 D, and #00 E. Also, for anyone having trouble with gauge between 2/0 and 3/0 a US steel #3 (2.1mm) may be of assistance.
2008-10-18 06:09 pm (UTC)
2009-01-18 03:49 pm (UTC)
http://grannymaniascanalblogcom
Thank you very much, this will help me a lot as well as the brackets French blogs http://crochetprintempscanalblogcom
http://grannymaniascanalblogcom
Coeuralouvrage
http://bycoeuralouvrage.canalblog.c
2009-01-18 09:49 pm (UTC)
(Anonymous)
2009-01-25 10:25 am (UTC)
a french crochet girl