Which PE size do I need for my pound test?

The smallest size of each line whose rated strength reaches the pound test on the left, using each maker's own figure.

We use the maximum strength where the maker gives one. YGK does not say whether its figures are maximum or average, so its column uses those figures as they are. Seaguar also publishes average figures, which are a little lower; see its spec page.

Pound testYGKDUELSeaguarSunlineVARIVAS
8 lb#0.614 lb basis not stated#0.613 lb maximum#0.614 lb maximum#0.58 lb maximum#0.613 lb maximum
10 lb#0.614 lb basis not stated#0.613 lb maximum#0.614 lb maximum#0.610 lb maximum#0.613 lb maximum
12 lb#0.614 lb basis not stated#0.613 lb maximum#0.614 lb maximum#0.812 lb maximum#0.613 lb maximum
14 lb#0.614 lb basis not stated#0.816 lb maximum#0.614 lb maximum#116 lb maximum#0.816 lb maximum
16 lb#0.816 lb basis not stated#0.816 lb maximum#0.818 lb maximum#116 lb maximum#0.816 lb maximum
20 lb#122 lb basis not stated#120 lb maximum#120 lb maximum#1.220 lb maximum#120 lb maximum
25 lb#1.225 lb basis not stated#1.227 lb maximum#1.526 lb maximum#1.525 lb maximum#1.531 lb maximum
30 lb#1.530 lb basis not stated#1.530 lb maximum#235 lb maximum#1.730 lb maximum#1.531 lb maximum
35 lb#240 lb basis not stated#235 lb maximum#235 lb maximum#235 lb maximum#237 lb maximum
40 lb#240 lb basis not stated#2.545 lb maximum#348 lb maximum#2.540 lb maximum#346 lb maximum
45 lb#2.545 lb basis not stated#2.545 lb maximum#348 lb maximum#350 lb maximum#346 lb maximum
50 lb#350 lb basis not stated#350 lb maximum#462 lb maximum#350 lb maximum#461 lb maximum

— means the line has no size rated that high in the sizes listed here. Strength is not the only thing that matters: thinner line casts further and cuts through current, thicker line resists abrasion.