Seegee:
A yard in the imperial system was about 3 feet, which is equivalent to a metre in metric.
I've always remembered three helpful rhymes from my youth which were printed, if I remember rightly, on cornflakes packets:
A metre measures three foot three
It's longer than a yard, you see
A litre of water's
A pint and three quarters
Two and a quarter pounds of jam
Weighs about a kilogram
Here in the UK, these rhymes are still useful because we've got ourselves into a neither-one-thing-nor-the-other situation. Post Brexit, it's hard to imagine things ever changing. Any attempt to do away with road signs in miles or pints of beer would be met with public uproar!