Depends, anywhere from 7lb to 25lb would do the job, if you want some fun on the tackle then tend towards the lower end, if not then the higher end, also depends on the ground you're fishing into. Personally I'd tend towards 12lb ish
you do not stae if you will be using plugs, lures or bait. You also do not say the ground you will be fishing. If you could state where you intend to use and how you intend to fish for them then i will be able to help you a lot more.