Hook Size Chart
Recommended hook size by fish, with numbering guide
Hook size by fish
Recommended size
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⚠️ Hook sizing differs by system — freshwater hooks get bigger as the gauge rises, while sea hooks (#) get smaller as the number rises. Even at the same number, actual size differs by maker and hook type, so the table is a general reference.
Reference (fish ↔ size)
| Crucian carp | #2-5 small / #6-9 mid / #10-13 large |
| Carp | #12-17 |
| Sea bream | #2-5 |
| Rockfish/Flounder | #13-20 |
| Red seabream | #10-15 |
| Bass (lure) | #1-4/0 offset |
Hook types & target fish
| Hook type | Main target | Notes |
|---|---|---|
| Crucian carp hook | Crucian carp, carp (freshwater) | Long thin shank, good for paste/worm bait |
| Chinu (black seabream) hook | Black seabream | Short shank, strong bend, surf & rock |
| Grease (rabbitfish) hook | Rabbitfish, halfbeak | Fine wire for easy inhaling, light rigs |
| Iseama-type hook | Red seabream, parrotfish, big fish | Wide gap, heavy wire for big mouths |
| Seigo hook | Sea bass, rockfish | Long and strong, bait or lure |
| Ajing/rockfish hook | Rockfish, horse mackerel | Very small and light for subtle bites |
※ Even within one type, shape and sizing vary by brand and series. Choose by target fish.
⚠️ Hook sizes have no unified international standard, so the same size number can differ in actual size by maker and hook pattern. Recommended sizes by species are common ranges; adjust one or two sizes up or down for fish size and activity. calcstool.com assumes no liability for tackle choices or fishing outcomes based on these results.
FAQ
Does a bigger number mean a bigger hook?
It depends on the system. Freshwater hooks get bigger as the gauge rises, while some sea hooks (#) get smaller as the number rises.
What size for crucian carp?
Roughly #2-5 (small), #6-9 (mid), #10-13 (large), varying by maker and hook type.
Same number = same size?
No. The same number differs in real size across hook types and makers, so the chart is a reference.