The ear wires, if they are the shepherd hook style, must always be longer than the earring itself. If not the earrings tip and fall out. This is a common mistake that even big manufacturers make.
Additionally, be sure that the small curve that the dangle itself
hangs from is situated under the center of the arc that is in the
earlobe. This changes the center of gravity so that the dangle weight
is below the earlobe instead of in front of it, reducing the tip-out
force. To do this, when shaping the curve for the earlobe, instead of
a 1/2 circle, make the arc almost 2/3 of a circle.
Hope this helps.
Pam Chott
www.songofthephoenix.com