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Fish hook size guide

International classification of the fishing hook sizes is not strictly defined.
Tiemco and Mustad hooks number 32
Comparison of the hooks number 32 from Tiemco and Mustad, scale is in mm.
Every single company use their own fish hook sizes guide, which can be different within the industry. The deviation between same number hooks from different companies can achieve even 50%. Within one company, the size of the hooks correspond with their numbers consistently. In many countries different fish hook size guide is applicable. From our point of view, the hook size classification, based on the real hook sizes is the best one, but such systems are not wide spread in the world.

The average sized hook in the international fish hook size guide has the size 1. Smaller hooks are labelled with whole numbers from 1 to 32, and the smaller size of the hook corresponds to the larger number. Large hooks are numbered from 1/0 to 27/0, and larger number corresponds to a larger size.
Fishing hook size guide
The comparison of the different sizes of the fishing hooks.
Also, this numbers only represents the gap size of the hooks, and there is no world accepted classification for the shank length.

In the table below you can find the the fish hook sizes guide for few different classifications from all around the world.

International classificationJapanese classificationFinnish classificationRussian classificationGap size*, mm
2426--1.7
2224--2
2022--2.2
1921222.02.4
1820202.52.6
1719183.03
1618--3.2
1517163.53.4
1416--3.6
1315144.04
1214--4.4
1113124.54.6
1012-5.05
911--5.5
810106.06
79--6.5
6887.07
57-7.57.5
4668.08
35-8.58.5
2449.09
1311110
1/01/01212
2/02/01414
3/03/01616

*This is an average gap size.

Due to a very high deviation in the hook sizes for the same number, this fish hook size guide should be used with reasonable precautions, and always check the real hook size. Furthermore, choosing the proper fishing hook for the next event, it is necessary to select proper shank length of the selected hooks.




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