Understanding HOOK sizes

Understanding hooks, sizes and applications.


Have you ever been at your favorite store looking while being confused with all the different size hooks or when ordering online your not sure what size 4 is vs 4/0 (which is pronounced as aughts)

If you’re seeing hooks with the / after the number then it’s using the aught measuring system.

For instance,  if your looking for a 3/0 hook and you pick up a number 3 hook they will not be the same, beware!

Hooks are classified by sizes; for example, a size 1 hook is larger than a size 7, while a 1/0 is smaller than a 7/0 (pronounced 7 aught).

Hooks also vary from thickness/gauge wire which should be based on your fishing application/presentation. The thicker the gauge, the quicker it will fall and the lesser gauge, the slower it will fall. Presentation is key…

Hooks also come in many different ends/points from needle, spear, rolled in, hollow to knife edge.

You can purchase barbed hooks and even barbless hooks. Based on your local regulations you may be required to use barbless.

There is no standardization in hook gap so if you purchase multiple 3/0 hooks they will likely have different gap’s. So choose what best fits your application/tackle.

Hopefully this article provides some helpful information when choosing your next hook/s.

Below are some photos of different hooks mentioned throughout this article.

Tight lines, team FishingZone.

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