The pattern says:
outside fabric, 24"
inside fabric, 21"
heat-resistant fabric (special batting), 21"
They folded the outside fabric over, mitered the corner and used that as the binding.
STRAPS
fabric strip for inside - 27" x 4". They said to turn under 1/2" on each end and sew on....I found that too long, so I folded more than that.
2 3 1/2" x 4" pieces for the D-ring loops.
the straps are 4" wide, folded with right side in, 1/4" seam, then turned inside out.
Does this make sense???????? LOL. e-mail me if not.