Measures covered
The figures below are the ones Sorrel has checked so far. Each row says where its value comes from.
| Unit | Value | Source status | Basis |
|---|---|---|---|
| Yard | 0.9144 m | Primary | Weights and Measures Act 1985, Schedule 1, Part VI |
| Inch | 0.0254 m (1/36 yard) | Primary | Same Act, Part VI |
| Gunter chain | 20.1168 m (22 yards) | Primary for the length; its link to the rod is secondary | Same Act, Part VI |
| Rod (5½ yards, 16½ feet) | 5.0292 m | Primary | Statutes of the Realm, vol. 1, the statute on the composition of yards and perches |
| Hand (4 inches) | 0.1016 m | Primary | Horses Act 1540 (32 Hen. 8 c. 13), Statutes of the Realm, vol. 3 |
| Irish perch (21 feet) | 6.4008 m | Primary | Boundaries Act 1721, Irish Statute Book, Act 5 |
The 1985 Act does not define the rod, so the rod's value rests on the older statute. Where a source is a later reference work, the note says so.