Section 0 in The Legal Metrology (General) Rules, 2011
0.4mm in the case of Class I and Class II tape measures, and 0.5 mm in the case of Class III tape measures.(h)In the case of tape measures of nominal length 0.5 m to 5 m, the graduation lines may have a length between one-fourth and full width of the tape, depending upon convenience. In the case of tape measures of nominal length above 5m, the length of the graduation lines may be as follows :-(i)for millimetre graduation lines, about one-third of the width of the tape;(ii)for 5 millimetre graduation lines, about half the width of the tape;(iii)for 10 millimetre graduation tines, about two-thirds the width of the tape; and(iv)for 100 millimetre graduation lines and for metre graduation lines as well as for the zero graduation lines, equal to the width of the tape.
