Section 0 in The Standards of Weights and Measures (General) Rules, 1987
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. [Omitted by G.S.R. 253(E), dated 5th April, 2004](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 5 m, 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 lines, 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 ze: o graduation lines, equal to the width of the tape.
