How to Choose a Cast Net: Radius, Mesh Size and Lead Weight Explained

A cast net is the single piece of gear that most changes what you can catch. Live bait you netted yourself outfishes anything you can buy, and it opens up snook, tarpon, kingfish and cobia in a way artificials simply do not.

But cast nets are sold by three numbers that most shops never explain, and buying the wrong combination is why so many nets end up in a garage after two frustrating trips.

Radius: how much water you cover

Radius is measured from the horn (the centre) to the lead line, so a 6-foot net opens into roughly a 12-foot circle.

Coverage grows fast. A 4-foot net covers about 50 square feet. A 6-footer covers 113. An 8-footer covers 200. A 10-footer covers 314.

The temptation is to buy big. Resist it. A large net you cannot open catches nothing, and a rope-shaped net landing on a bait school scatters it and ruins the spot for twenty minutes.

• 3 to 4 feet — kids and beginners, docks, seawalls, tight quarters on a small skiff.
• 5 to 6 feet — where most adults settle. Enough coverage to load a livewell, light enough to throw all morning.
• 8 feet — serious bait catching. Takes real technique and practice.
• 10 to 12 feet — professional territory. Genuinely hard work from a pitching deck.

Be honest about your throw. Most people are better served by a 6-footer they open perfectly than an 8-footer they open two-thirds of the time.

Mesh size: what you keep

Mesh is measured as the size of one square. It decides two things at once — what bait stays in the net, and how fast the net sinks.

• 1/4 inch — tight. Holds glass minnows, small pilchards, shrimp. Sinks slowest because it pushes the most water.
• 3/8 inch — the all-rounder. Holds decent pilchards through small mullet, sinks noticeably faster. If you buy one net, buy this mesh.
• 1 inch — mullet mesh. Small bait swims straight through, which is the intent. Sinks fastest by a wide margin.

That sink-speed trade-off matters more than people expect. Over deep bait, a tight-mesh net pushes a pressure wave ahead of it, and the school feels it and drops out the bottom of the circle before the lead line closes. You come up with a net full of water.

If you are consistently missing bait in deeper water, the answer is usually more open mesh or more lead — not a bigger net.

Lead weight: how fast it closes

Lead is quoted in pounds per foot of radius. A 6-foot net at 1.5 lb per foot carries 9 pounds of lead. The same net at 3/4 lb per foot carries 4.5.

• 3/4 lb per foot — light weighting. Right for shallow water where the net needs to open wide and land flat rather than sink fast. Far easier to throw repeatedly.
• 1.25 lb per foot — mid weighting, common on mullet nets.
• 1.5 lb per foot — pro weighting. Sinks fast and closes hard. What you need over deep bait or in current.

Here is the thing most people get wrong: if you are struggling with a big net, it is almost always the lead you are fighting, not the radius. An 8-foot net at 3/4 lb per foot is far more throwable than a 6-footer at 1.5.

Clear versus coloured mesh

Clear monofilament mesh genuinely matters in clean Gulf water. Bait sees a coloured net coming and scatters before the lead line closes; a clear net gets closer before they react.

In stained or tannic water it makes much less difference, and coloured nets are easier to see and untangle on a dark deck.

Putting it together

Learning to throw? 4 to 5 feet, 3/8 mesh, light lead. Practice on grass before you take it on the water.

General inshore bait — pilchards, greenies, small mullet? A 6-foot net in 3/8 clear mesh is the most useful single net in Florida.

Small bait in clean water? 1/4 inch mesh, and accept the slower sink.

Mullet in deeper water? A 1-inch mesh mullet net at 1.25 lb per foot. During the fall mullet run, one good throw can make the entire trip.

Deep bait or hard current? A 1.5 lb per foot pro net, and be ready for the workout.

Two things that make a net last

Rinse it in fresh water after every single trip. Salt crystallises in the mesh and cuts the fibres, and a net that should last five seasons dies in one.

Dry it before you store it. A wet net in a bucket in a hot garage rots.

Do both and a good net outlives several rods.

Browse the full range in cast nets.