Fishing Hook Size Chart In Mm

These are "aught" sizes. As the number before the slash gets larger, the hook gets larger. A 10/0 is a massive hook for ocean predators. Fishing Hook Size Chart (Approximate MM)

– Excellent for technical anglers, slightly confusing for beginners. fishing hook size chart in mm

A largemouth bass can easily engulf a 4/0 hook (16mm gap). A crappie, with its small mouth, struggles with anything over 8mm. Measure the fish’s mouth corner-to-corner. These are "aught" sizes

| Hook Size | Gap Width (mm) | Shank Length (mm) | Overall Length (mm) | Best For | |-----------|----------------|-------------------|---------------------|-----------| | 1/0 | 11 mm | 23 mm | 44 mm | Largemouth bass, pike, small musky | | 2/0 | 12.5 mm | 25 mm | 48 mm | Striped bass, catfish (medium), redfish | | 3/0 | 14 mm | 27 mm | 52 mm | Northern pike, large catfish, salmon | | 4/0 | 16 mm | 30 mm | 58 mm | Musky, large salmon, small shark | | 5/0 | 18 mm | 33 mm | 64 mm | Flathead catfish, medium shark, grouper | | 6/0 | 20 mm | 36 mm | 70 mm | Large musky, amberjack, small tuna | | 7/0 | 22 mm | 40 mm | 78 mm | Big catfish, cobia, barracuda | | 8/0 | 24 mm | 44 mm | 86 mm | Large grouper, shark (5-6 ft) | | 9/0 | 26 mm | 48 mm | 94 mm | Big shark, large tuna, halibut | | 10/0 | 28 mm | 52 mm | 102 mm | Large shark (6-8 ft), giant trevally | | 12/0 | 32 mm | 60 mm | 118 mm | Tiger shark, large goliath grouper | | 14/0 | 36 mm | 68 mm | 134 mm | Big tiger shark, large sturgeon | | 16/0 | 40 mm | 76 mm | 150 mm | Large bull shark, bluefin tuna | | 18/0 | 44 mm | 84 mm | 166 mm | Giant trevally, large grouper (200lb+) | | 20/0 | 48 mm | 92 mm | 182 mm | Monster shark (10+ ft), large marlin | Fishing Hook Size Chart (Approximate MM) – Excellent

| Standard Size | Approx. Gap (mm) | Typical Target Species | Best Bait Size | | :--- | :--- | :--- | :--- | | | 1.5 mm | Tiny Minnows/Micro Fish | Micro Midge larvae | | Size 28 | 2.0 mm | Small Trout | #28 - #24 Flies | | Size 24 | 2.5 mm | Trout, Bluegill | Small maggots | | Size 20 | 3.0 mm | Trout, Roach | Single maggot | | Size 18 | 3.5 mm | Trout, Skimmers | Small worms | | Size 16 | 4.0 mm | Grayling, Large Trout | Large maggots | | Size 14 | 4.5 mm | Bass, Walleye | Small lures/Spinners | | Size 12 | 5.0 mm | Bass, Bream | Medium worms | | Size 10 | 5.5 mm | Carp, Tench | Sweetcorn/Pellet | | Size 8 | 6.0 mm | Large Bream, Catfish | Double corn | | Size 6 | 7.0 mm | Bass, Sea Trout | Medium crabs | | Size 4 | 8.0 mm | Pike, Small Bass | Large worms | | Size 2 | 9.0 mm | Bass, Flounder | Minnows | | Size 1 | 10.0 mm | Bass, Sea Fish | Small fish strips |

Before diving into the chart, let’s decode the logic. The fishing hook sizing system follows two parallel scales: