I specialize in dangle earrings, which I make myself by hand (with tools!). The ear wires vary. Many are round, some are square or rectangular. Some are longer than others. Since I make them myself, I can easily custom-make them for your needs.
I also have some posts. I looked around a long time for earnuts I trusted and liked. They are sterling with a silicone cover which is both attractive and stable. Just twist them on and off. Almost any earring can be made into one that uses sterling clips for those with no holes in the ears.
Many of my earrings can be made with different semi-precious stones. If you find one you like, but want a different color, check with me.