Every stone about the weight of a talent (hōs talantiaia). Old adjective (from talanton), here only in N.T., but in Polybius and Josephus. See Exo 9:24 for the great hail in Egypt and also Jos 10:11; Isa 28:2; Eze 38:22 for hail as the symbol of God’s wrath. In the lxx a talanton ranged in weight from 108 to 130 pounds.
Because of the plague of hail (ek tēs plēgēs tēs chalazēs). “As a result of the plague of hail.” This punishment had the same effect as in Rev 16:9, Rev 16:11.
Exceeding great (Megalē - sphrodra). Emphatic positions at ends of the clause (great - exceedingly).