If your ears are not sencetive and are used to a thicker gauge wire then go with the 16 gauge option. They will stand out more. If you're ears have very small piercings then go with the 18 gauge thinner wire.
Also choose medium or long
If you love the look of these but without the threader pull through style you can also find these with the regular ear wire under "Edgy Earrings " shown in last photo