I'm not good at imagining or recalling weight.
if it's any use to anyone:
(rounding up or down/ approximates)
I write mainly with my RIGHT hand.
(easier to remember just one direction)
A yard or metre is approximately one good walking stride.
"4 metres/yards from the finish line" would be the approximate equivalent of 4 good strides.
(quite close to the finish line)
one mile would be approximately 1,700 good strides or paces.
UK driving test requires a registration plate to be read from a distance of 20 metres.
20 good paces away from the car.
vehicles displaying the sign
'Please leave 3 metres clear at the rear of this vehicle"
(ambulance, emergency vehicles, disability carriages)
-Don't park any closer than 3 good paces behind those vehicles.
An inch is the approximate equivalent of one section of your finger joints.(adult)
someone asks you to pass them a two inch nail from a box of various sizes,
measure the nail against the tip of your finger along to the second joint or bend.
one inch = 2.5cm
someone asks you to pass them the 10cm length of wood from a huge pile of various sizes,
it's the piece that's 4 finger joints (inches) long - if you're not carrying a tape measure in your pocket
these methods would be useless in your engineering exam
or where precision is required.