Originally Posted by DogHouseMom
Are you asking how much extra border length on each side to MITER the border corners?
No math, if your border is 5" wide all around, then your borders need to be 10" longer + a little fudge room if you want to be safe.
IOW - each border corner needs to extend at least to the outside edge of the connecting border.
Are you saying the 45 degrees' farthest point should be twice the width of the border + wiggle room?
Thanks.