Each spoon is hallmarked with NM, 830S used in Norway to denote 83% silver purity and a cup as a maker's mark used by Thorvald Marthinsen in the early 20th century. Condition of spoons is perfect, no damages. Beautiful set! Length of each spoon: 4.0 inches, width (bowl): 7/8 inches. Total weight of the set: 1.6 oz.