Measure well your measurements
Crudely rough will not suffice
Or with size which truly matters
The metric portion is precise
Pounds and ounces feet and inches
Yards and miles though near or far
A muddled scheme of quantities
Whose goods of weight ‘Avoirdupois’
From a thousandth to the thousands
Is all one needs to understand
Liquids, volumes or the depth of mass
Incrementally they stand