Strewth wrote:No hard and fast rules on this. Some claim that the gape should be the same as the widest points between the treble points, but this is often too big. From memory, some examples of sizes I use:
X-rap 10 size 1/0 7237
Skitter pop size 1/0 7237
gold bomber size 1/0 7266 or owner 1/0 (for barramundi)
vision 110 size 2 7266
lucky craft pointer 78 DD belly size 1, back size 1/0 7266
lucky craft pointer 78 belly size 1, back size 1/0 7266
For medium-sized deep diving cranks with big bibs, 1/0 is usually the size needed.
Of course, they can tangle if the shanks are too long or the hook is too big, so it pays to check this too.