I think everyone has helped work this out for me. It’s not about a wide binding but a thick binding regardless of how wide it is. You need to have more batting than the width of the binding. But for me I’ll have to have more of the entire sandwich.
See this YouTube at the 6:20 min point.
https://youtube.com/playlist?list=PL...RLOl5z9wran6Mv
Say I want a 3/8 inch finished binding
I want my quilt to finish 1/4 inch in from (to the left of) the edge of my quilt top (the
problem is mine is always a bit uneven by the time I’ve basted and quilted it unlike the quilt in the video) so I need to mark that 1/4 inch line on the quilt and cut the whole sandwich 1/2 an inch from my 1/4 finished line. Then I sew my 1 and 3/8 inch binding onto the front of the quilt 1/2 an inch from the edge of the rotary cut sandwich but with a 1/4 inch seam.
Then I pull it around to the back and sew it on pulling it tight so it ends up puffier than the usual 1/4 inch seam and sandwich would give you. I might have to adjust the width of my binding strip a tiny bit. I’ll have to experiment. Thank you!