Everything we buy has a carbon footprint.
It's a measure of all the greenhouse gases emitted during every stage of its production, expressed as a carbon dioxide equivalent (CO2e).

A bar of chocolate typically has a CO2e of 100g. A pair of Levi 501 jeans is 33kg. An iPhone 13 is 64kg. A flight from London to New York, per passenger, is 986kg. And a new Ford Focus car is 8,000 kg.

So far there are only a few consumer products that actually display their carbon footprint on the packaging.