Small amount of embroidery thread or crochet thread. Two skeins of embroidery thread will be enough for one pair and only one skein of each color is needed for pairs with multiple colors.
US #4/1.75mm (or size to get gauge)
Tapestry needle, earring findings
8 stitches = 1”/2.5 cm in double crochet
1.5”/3.75 cm x 1.5”/3.75 cm