In American baking recipes they often refer to a "stick" of butter. What do they mean by a "stick"?

When you buy a pound of butter and it comes in quarters, those are "sticks" of butter.

4 oz, 8 Tbsp, or ¼ Lb of butter.

1/4 pound of butter.

It's the way they sell it there. A stick of butter weighs 4 oz. You buy a pound and it is packaged as 4 sticks.

I see you're British and of course we don't get it sold in the same shape - so our normal 250g block amounts to 2 sticks, give or take a little bit. Half a pack will be a little more than a stick, so weigh it out if the weight is crucial.

our butter is in one pound packages divided into 4 pieces or sticks, so it is 1/4 of a pound or 1/2 cup.

0.5 cups is a stick.

One stick of butter equals 1/2 cup. The measurements are printed on the side of the wrapper.

1/4 pound...generally American butter is packaged by the pound, with 4 individually wrapped "sticks" of butter inside.

1/4 pound. Butter is commonly sold in 1 lb packages. Inside it is divided into 4 individually wrapped "sticks" or rectangles. One "stick" is 1/4 of a pound or 113.4 grams

Im assuming they mean a whole bar of butter, as some butter brands are packaged in a recrangular prism shape. So i guess that would be a stick