Clean, measure and cut one 16-1/2 inch piece of 21-gauge square half hard wire.
Use a pin vise or an automatic wire twister to put a "slight" twist in the entire length of wire.
From each untwisted end, trim off 1/8 inch.
From the twisted wire length, measure and cut two of each of the following lengths: 3-3/8 inches, 2-3/4 inches, and 2 inches.
Separate one of each length into two piles, one pile for each earring.