# The Weights and Measures Regulations 1963, Paragraph 2


Imperial system
End measures
Line measures
Measures made of metal: purported value
Error in excess
Error in deficiency
Error in excess
Error in deficiency
inches
inches
inches
inches
Under 1 foot
0.01
0.01
0.005
0.002
1 foot to 1 yard inclusive
0.03
0.015
0.02
0.01
Above 1 yard and under 10 feet
—
—
0.05
0.05
10 feet and under 50 feet
—
—
0.2
0.2
50 feet to 100 feet inclusive
—
—
0.3
0.3
In the case of measures made of material other than metal, the foregoing amounts of error shall be increased to double the said amounts.

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Source: https://www.legislation.gov.uk/uksi/1963/1710/schedule/1/paragraph/2 (the official version)
Page: https://openlegislation.uk/weights-and-measures-regulations-1963/schedule-1/paragraph-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.