Boyd’s Bible Dictionary:
(field). Edge, or fringe, of a garment (Num. 15:38-39; Matt. 23:5).
Concise Bible Dictionary:
On the hem of the high priest’s robe were pomegranates of blue, and purple, and scarlet, and twined linen, placed alternately with a golden bell—typifying that fruit and testimony flow from Christ’s heavenly position, and are borne and rendered by Christians through abiding in Him (Ex. 28:33-34; 39:24,26). All the Israelites were to wear on the border of their garment a riband of blue (the color of heaven) that they might look upon it and remember the commandments and be holy unto God: typical of the walk of the Christian as being heavenly in its character, not according to this world, but according to the good and perfect and acceptable will of God (Num. 15:38-40). The Lord had, alas, to declare that the scribes and Pharisees, among other pretended marks of sanctity, enlarged the borders of their garments to be seen of men (Matt. 23:5).
Hem