In the US, sticks of butter have tablespoon measurements printed on the label, like this: www.errenskitchen.com/…/butter-sticks.jpg

Most people leave the sticks of butter in the fridge with the labels on. If you want X tablespoons of butter, you cut through the label and butter at the right mark.

I’m not saying it’s an ideal system (I also prefer recipes that use weights) but it works.