This table is “current sizes” based on information provided at the manufacturer web sites and (added September 2007) for the corresponding US Knitting Needles, as shown at the yarnstandards.com resource website

You are welcome to link to this page or create your own.
Speaking of size, If Size Matters for your finished project, be sure to make a gauge swatch (I recommend TWO, one for reference and one to wash and dry as the project will be)
Shameless self promotion – my online store, ItsAllJustString.com offers all Crochet hooks offered by either Clover or Pony.

If you find any errors, be sure to let me know.
| Alum Milli Meter |
UK | US Yarn Std |
Clover or Tulip |
Clover Soft 5.3/4″ |
Clover Wood 6″ |
Pony Set Gift |
Pony Pearl |
Boye Alum 6″ |
Bates | ||
| 2.00mm | _ | A-0 | 2/o | - | - | - | - | - | - | ||
| 2.25mm | 1 | - | 3/o | B | - | - | - | B | B | ||
| 2.30mm | _ | B-1 | 3/o | - | B | - | - | - | - | ||
| 2.50mm | _ | - | 4/o | C | - | 2.50 | - | - | - | ||
| 2.75mm | 2 | - | - | - | C | - | - | C | C | ||
| 3.00mm | _ | C-2 | 5/o | D | - | 3.00 | - | - | - | ||
| 3.25mm | 3 | - | - | - | - | - | - | D | D | ||
| 3.50mm | 4 | D-3 | 6/o | E | - | 3.50 | - | E | E | ||
| 3.75mm | 5 | E-4 | - | F | D | - | F | F | F | ||
| 4.00mm | 6 | F-5 | 7/o | G | E | 4.00 | G | - | G | ||
| 4.25mm | _ | G-6 | - | - | F | - | G | - | |||
| 4.50mm | 7 | - | 7.5/o | 7 | G | 4.50 | - | - | - | ||
| 5.00mm | 8 | _-7 | 8/o | H | H | 5.00 | H | H | H | ||
| 5.50mm | 9 | H-8 | 9/o | I | I | 5.50 | I | I | I | ||
| 6.00mm | 10 | I-9 | 10/o | J | J | 6.00 | J | J | J | ||
| 6.50mm | 10.5 | J-10 | – | - | - | 6.50 | - | K | K | ||
| 7.00mm | _ | K-10.5 | - | - | - | 7.00 | K | - | |||
| 7.50mm | _ | - | - | - | - | 7.50 | - | - | - | ||
| 8.00mm | 11 | - | - | - | - | 8.00 | - | - | L | ||
| 9.00mm | 13 | L-8 | - | - | - | - | M | N | - | ||
| 10.00mm | 15 | N-13 | - | - | - | - | - | - | N | ||
| 12.75mm | 17 | - | - | - | - | - | - | - | N | ||
| 15.00mm | 19 | - | - | - | - | - | - | - | N | ||
| 19.00mm | 35 | - | - | - | - | - | - | - | N | ||
| 25.00mm | 50 | - | - | - | - | - | - | - | N | ||
|
|||||||||||
Once again,
* Based on Data Current as of February 2007.
* ALWAYS MAKE A GAUGE SWATCH
* ALWAYS check/measure the diameter of your hook
- Older Hooks often do NOT have the same Diameter as those made today.
-
* If you find an error, please do comment or email with the correction.
2007-05-03: Thanks to Kim Guzman for catching the typo for the Clover H-I-J

Steel Crochet Hook Cross Reference
After doing this bit of Research, it was pretty easy to see why the Craft Yarn Council did not publish any standards for Steel Hooks in its Yarn Standards.Com charts
Most Steel Hooks Look like this:

However, for those who appreciate Gentle on your hands and wrist, it is so cool that Clover will be bringing the Steel Soft Touch to the US so they can be more available (now only one supplier has them and it is in the Japanese packaging.

This will be great for those who like to do wire work as well.
Now back to the chart… It is fairly simple to see why good pattern editors (and designing authors) ALWAYS include the diameter of hooks and needles used – rather than just a “generic” letter or number.
I always prefer to base my Steel hook references and suggestions on metric measurements because all “brands” are made outside the US, in countries that base their engineering on M
etric standards, not Imperial.
If you would like details on Clover’s Soft Touch Steel hooks, including the thread sizes they recommend for each of their hooks, please visit our on-line retail shop ItsAllJustString.com
In a perfect world, these manufacturers will someday agree on “Size/Measurements” but probably not anytime soon.
| Updated: 2008-09-14 © 2000-2008 WheatCarr |
||||||||||
| R o w 0 |
Col 1 Steel MM |
Col 2 Clover |
Col 3 Clover SoftTouch |
Col 4 Pony |
Col 5 Boye |
Col 6 Bates |
Col 7 Inox |
Col 8 tulip Skacel |
R o w |
|
| 1 | 0.40mm | – | – | – | – | – | No 16 | No 24 | 1 | |
| 2 | 0.45mm | – | – | – | – | – | - | No 23 | 2 | |
| 3 | 0.50mm | – | No 14 | – | – | – | No 15 | No 14 | 3 | |
| 4 | 0.55mm | – | – | – | – | – | - | No 13 | 4 | |
| 5 | 0.60mm | No 12 | No 12 | No 14 | – | – | No 14 | No 12 | 5 | |
| 6 | 0.70mm | – | – | No 13 | – | – | - | No 11 | 6 | |
| 7 | 0.75mm | No 10 | No 10 | No 12 | No 14 | – | No 13 | No 10 | 7 | |
| 8 | 0.85mm | – | – | no-name | No 13 | – | - | No 9 | 8 | |
| 9 | 0.90mm | No 8 | No 8 | no-name | – | No 14 | - | No 8 | 9 | |
| 10 | 0.95mm | – | – | – | – | No 13 | - | No 7 | 10 | |
| 11 | 1.00mm | No 6 | No 6 | no-name | No 12 | No 12 | No 12 | No 6 | 11 | |
| 12 | 1.05mm | – | – | – | – | No 11 | - | - | 12 | |
| 13 | 1.10mm | – | – | – | No 11 | – | - | No 5 | 13 | |
| 14 | 1.15mm | – | – | – | – | No 10 | - | 14 | ||
| 15 | 1.25mm | No 4 | No 4 | No 8 | – | No 9 | No 10 | No 4 | 15 | |
| 16 | 1.30mm | – | – | – | No 10 | – | - | No 3 | 16 | |
| 17 | 1.40mm | – | – | – | No 9 | No 8 | - | - | 17 | |
| 18 | 1.50mm | No 2 | No 2 | No 7 | No 8 | No 7 | No 8 | No 2 | 18 | |
| 19 | 1.60mm | – | – | – | – | No 6 | - | No 1 | 19 | |
| 20 | 1.65mm | – | – | – | No 7 | – | - | - | 20 | |
| 21 | 1.70mm | – | – | – | – | No 5 | - | - | 21 | |
| 22 | 1.75mm | No 0 | No 0 | No 4 | – | No 4 | No 6 | No 0 | 22 | |
| 23 | 1.80mm | – | – | – | No 6 | – | - | - | 23 | |
| 24 | 1.90mm | – | – | – | No 5 | – | - | - | 24 | |
| 25 | 2.00mm | – | A-0 | - | - | - | No 4 | 2/0 | 25 | |
| 26 | 2.20mm | – | – | – | – | – | No 16 | 3/0 | 26 | |
| 27 | 2.25mm | – | - | 2/o | - | - | - | - | 27 | |
| 28 | 2.30mm | – | B-1 | - | - | B | - | - | 28 | |
| 29 | 2.50mm | – | - | 3/o | - | - | - | 4/0 | 29 | |
| R o w |
Col 1 Steel MM |
Col 2 Clover |
Col 3 Clover SoftTouch |
Col 4 Pony |
Col 5 Boye |
Col 6 Bates |
Col 7 Inox |
Col 8 Tulip |
R o w |
|
|
* Based on Data Current as of February 2007, updated to add photos on 2007-May-02 updated to add Tulip on 2007-May-24 updated to add on 2008-Sep-14 * ALWAYS MAKE A GAUGE SWATCH * ALWAYS check/measure the diameter of your hook - Older Hooks often do NOT have the same Diameter as those made today. - * If you find an error, please do email me with the correction. | ||||||||||
Incidentally, you can often find reasonably price templates intended for measuring screw sizes at your favorite Hardware store, (mine is ACE then Sears Tool department, since they are independently owned and the people at the ones nearest to me don’t ever laugh when I explain how I plan to use “stuff” – okay they do shake their head a lot, but they always understand what I want, if not why) As soon as I can find it, I will post a picture of my favorite one.
COMMERCIAL: If you want to add Clover Soft Touch Steel hooks to your collection, you can find them at: ItsAllJustString my on-line shop
Theme: Default 2007-Au-13 The sorting hat put me in
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