WATERFORD	USA	INCHES	MM
L	6 - 6 1/2	0.64 - 0.65	16.40 – 16.55
N	7	0.67 - 0.68	16.99 – 17.19
P	7 1/2 - 8	0.69 - 0.70	17.58 – 17.83
R	8 1/2 - 9	0.72 - 0.73	18.17 – 18.46