The British Army used 9 sizes for the 1953, 1960 and 1968 pattern combat smocks.
Sizes 1, 2 and 3 were for a person up to height 5 ft 7 with 3 chest sizes,
34 to 36 inches (size 1)
37 to 39 inches (size 2)
40 to 43 inches (size 3)
Sizes 4 to 6 were for a person from 5 ft 7 up to 5 ft 10 with the same 3 chest sizes.
The last three, 7, 8 and 9 were for 5 ft 10 up to 6 ft 2 with chest sizes
36 to 38 (size 7)
39 to 42 (size 8.)
43 to 46 (size 9)
After about 1968 NATO sizes were also used in the format of three metric height ranges (6070) (7080) (8090), these being 160 cm to 170 cm, 170 cm to 180 cm and 180 cm to 190 cm. Again for each height range there were 3 chest sizes, (8595) (9505) and (0515) for chests 85 cm to 95 cm, 95 cm to 105 cm and 105 cm to 115 cm. or 1020 for the largest smock (100 cm to 120 cm).
Sizes 1, 2 and 3 were for a person up to height 5 ft 7 with 3 chest sizes,
34 to 36 inches (size 1)
37 to 39 inches (size 2)
40 to 43 inches (size 3)
Sizes 4 to 6 were for a person from 5 ft 7 up to 5 ft 10 with the same 3 chest sizes.
The last three, 7, 8 and 9 were for 5 ft 10 up to 6 ft 2 with chest sizes
36 to 38 (size 7)
39 to 42 (size 8.)
43 to 46 (size 9)
After about 1968 NATO sizes were also used in the format of three metric height ranges (6070) (7080) (8090), these being 160 cm to 170 cm, 170 cm to 180 cm and 180 cm to 190 cm. Again for each height range there were 3 chest sizes, (8595) (9505) and (0515) for chests 85 cm to 95 cm, 95 cm to 105 cm and 105 cm to 115 cm. or 1020 for the largest smock (100 cm to 120 cm).