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Both letters and numbers are used to tell you the size of a crochet hook, though, with the small steel hooks used for creating lace and crocheting thread, only numbers are used. The "basic" hooks range from D to K (or 3.25 mm to 6.50 mm), which go from smaller to larger. Unfortunately, even though this sounds like a system of ensuring uniform hook sizes, the same size hook can actually vary from manufacturer to manufacturer, so please take the time to get to know your hooks and crochet those gauge squares in order to ensure that your crochet items come out the right size!
Steel Hook
| American | Metric |
Sizes | Sizes | Sizes |
14 | 0.75 mm | |
13 | 0.85 mm | |
12 | 1.00 mm | |
11 | 1.10 mm | |
10 | 1.30 mm | |
9 | 1.40 mm | |
8 | 1.50 mm | |
7 | 1.65 mm | |
6 | 1.80 mm | |
5 | 1.90 mm | |
4 | 2.00 mm | |
3 | 2.10 mm | |
2 | B | 2.25 mm |
1 | C | 2.75 mm |
0 | D-3 | 3.25 mm |
00 | E-4 | 3.50 mm |
F-5 | 3.75 mm | |
G-6 | 4.00 mm | |
7 | 4.50 mm | |
H-8 | 5.00 mm | |
I-9 | 5.50 mm | |
J-10 | 6.00 mm | |
K-10.5 | 6.50 mm | |
7.00 mm | ||
L-11 | 8.00 mm | |
M/N-13 | 9.00 mm | |
N/P-15 | 10.00 mm | |
P/Q | 15.00 mm | |
Q | 16.00 mm | |
S | 19.00 mm |
It would be helpful to know which numbers correspond with which letters correspond with which mm thickness crochet hooks. Could you help?
grjo@lantic.net
Good idea! I will post soon.
I noticed that I have a Boye 'G' hook that says it's 4.25 mm. It doesn't show up on most charts. You might want to look into that. Response: wow, I've never seen that before, I will have to see what explanation I can find for that and will post.
I noticed that I have a Boye 'G' hook that says it's 4.25 mm. It doesn't show up on most charts. You might want to look into that.
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