@TimWardCam
In Canada, butter comes in blocks with markers for 1 cup, 1/2 cup, 1/4 cup. Once you've removed any butter from one end, the ticks are less useful. And usually recipes call for a tablespoon which is smaller than any of the markings. I usually eyeball it or lookup a conversion to grams.
I think the US gets their butter in smaller pieces called sticks -- recipes often call for 1 stick of butter and I always need to lookup that conversion.