After using several different sizes of binding strips, I have found that 2 1/4" works best for me. I sew with a 1/4" seam and don't have a problem with the binding not being full. But I have found that when I used (notice the word USED) low loft polyester batting my edges were very limp. I only use Warm and Natural or others similar to it and never have problems with that type of batting. I have heard about leaving a little of the batting around the quilt when trimming, and also have heard of others who don't iron their binding in half. I'd be afraid then when trimming my edges I'd cut something I shouldn't. As for the ironing of the binding in half, I'd have to make a mental note NOT to, it just seems I'm on automatic drive when making binding. I love the binding part and to each his or her own on how they do it.