What Is the Thinnest Fishing Line?

Fishing line is an integral part of any angler’s arsenal, and choosing the right one can be the difference between a successful day on the water or a day spent spinning your wheels. One of the biggest decisions you will have to make when choosing a fishing line is thickness – do you want something that’s thin and inconspicuous, or something that’s heavier and more durable?

The thinnest fishing line available today is generally referred to as “ultra-thin” or “super-thin.” These lines are typically made from monofilament nylon or fluorocarbon, and they can be as thin as 1/16th of an inch in diameter. Ultra-thin lines are not only incredibly lightweight and virtually invisible underwater, but they also provide excellent sensitivity for detecting even the slightest nibble from a fish.

While there are advantages to using ultra-thin fishing line, there are also some drawbacks. For starters, these lines tend to be more fragile and prone to breakage than their thicker counterparts. Additionally, they may not be suitable for larger fish species or heavier lures, as they may not have the strength needed to reel them in successfully.

For anglers who want a balance between strength and invisibility, there are other options available such as “medium” or “light” fishing lines. These lines range in diameter from 0.17mm–0.30mm and offer a good compromise between visibility and strength. They are often made from copolymer materials which are designed to be both lightweight and durable.


What is the thinnest fishing line? Ultra-thin monofilament nylon or fluorocarbon lines are generally considered to be the thinnest option available today, with diameters as small as 1/16th of an inch.

However, anglers looking for a balance between strength and invisibility may find better success with medium-weight or light-weight copolymer fishing lines. Ultimately, selecting the best fishing line comes down to personal preference and what type of fish you plan on Targeting.

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Lindsay Collins