maviskw

This video does not allow for the thickness of the batt. It does take up some room, even if you squish it down.
I do not trim the batt and back to its final size before I sew on the binding. I just cut off excess if it will be in the way. Leave up to an inch on there.
Then I sew the binding on with the quarter inch seam using the edge of the quilt top as the guide. After the binding is on, I use a short ruler and rotary cutter to cut the back and batt exactly 3/8 of an inch from the sewing line.
It is important to measure from the sewing line.

Then I press the binding open carefully, turn it to the back and stitch in the ditch from the front. This needs to be pinned carefully, but I can do it without pins now that I have a little experience. I only need to pin the corners.

If you were going to hand sew the binding on the back, then the binding would be sewn onto the front and the 1/2 inch trim from the seam would be good