bearisgray

I take a lined index card with 1/4 inch lines on it to check/verify my seam width.

One way is to line up the edge of the presser with a line and see where the needle comes down and measure/check that distance.

Another way is to line up the needle with a line and see where the edge of the presser foot is in relation to the next 1/4 inch line.

It seems easier to me to figure out where that 1/4 inch is in relation to the edge of my presser foot than to rely on anything else.

I will pencil/chalk a dot on a turning point if I will be making a corner.


As others have already mentioned - for most of us, the objective is to get the unit/block/item to end up being the size (more or less, depending) that we intend it to be - and seam width is just one of several factors involved in achieving that result.