Fishing Hook - Size Chart In Mm

Print the chart from this article. Laminate it. Practice measuring hooks at home. Within a few trips, you’ll instinctively know that a #2 is 9mm, a 4/0 is 16mm, and a bluegill needs a 6mm gap.

| Fish Species | Recommended Hook Size | Gap Width (mm) | |--------------|----------------------|----------------| | Bluegill / Sunfish | #10 to #6 | 5–7 mm | | Crappie | #8 to #4 | 6–8 mm | | Trout (stream) | #12 to #8 | 4.5–6 mm | | Trout (lake) | #8 to #4 | 6–8 mm | | Walleye | #6 to #2 | 7–9 mm | | Largemouth Bass | #2 to 3/0 | 9–14 mm | | Smallmouth Bass | #4 to 2/0 | 8–12.5 mm | | Northern Pike | 2/0 to 6/0 | 12.5–20 mm | | Musky | 4/0 to 8/0 | 16–24 mm | | Channel Catfish | #2 to 3/0 | 9–14 mm | | Flathead Catfish | 4/0 to 8/0 | 16–24 mm | | Redfish / Snook | #1 to 4/0 | 10–16 mm | | Salmon | 2/0 to 5/0 | 12.5–18 mm | | Saltwater Surf | 4/0 to 9/0 | 16–26 mm | | Shark (small) | 6/0 to 10/0 | 20–28 mm | | Shark (large) | 12/0 to 20/0 | 32–48 mm |

| Hook Size | Gap Width (mm) | Shank Length (mm) | Overall Length (mm) | Best For | |-----------|----------------|-------------------|---------------------|-----------| | #32 | 1.5 mm | 3 mm | 5 mm | Tiny midges, fly fishing for micro species | | #28 | 1.8 mm | 4 mm | 6.5 mm | Small trout, grayling | | #24 | 2.0 mm | 5 mm | 8 mm | Very small nymphs, baitfish imitations | | #20 | 2.5 mm | 6 mm | 10 mm | Small panfish, stocked trout | | #18 | 3.0 mm | 7 mm | 12 mm | Trout, small bluegill | | #16 | 3.5 mm | 8 mm | 14 mm | Crickets, small worms for perch | | #14 | 4.0 mm | 9 mm | 16 mm | Crappie, small bass, roach | | #12 | 4.5 mm | 10 mm | 18 mm | Sunfish, small catfish, walleye | | #10 | 5.0 mm | 11 mm | 20 mm | Panfish, small trout, bream | | #8 | 6.0 mm | 13 mm | 24 mm | Bluegill, yellow perch, small carp | | #6 | 7.0 mm | 15 mm | 28 mm | Bass (small), catfish (small), crappie | | #4 | 8.0 mm | 17 mm | 32 mm | Largemouth bass (juvenile), walleye, trout | | #2 | 9.0 mm | 19 mm | 36 mm | Bass, pike (small), sea trout | | #1 | 10.0 mm | 21 mm | 40 mm | Largemouth bass, snook, redfish | fishing hook size chart in mm

The following chart provides common millimeter approximations for standard and "aught" (0) hook sizes. Standard Hook Size Chart (mm) In the standard numbering system, the larger the number, the smaller the hook Tackle Warehouse Hook size translated to mm, inches - Troutnut

Laminate this chart and keep it in your tackle box. Print the chart from this article

The difference between a trophy fish and a story about “the one that got away” often comes down to hook size. By using a , you eliminate guesswork. You can scientifically match your hook to the fish’s mouth, the bait’s profile, and the cover you’re fishing.

The traditional numbering system is inconsistent: Within a few trips, you’ll instinctively know that

– Excellent for technical anglers, slightly confusing for beginners.