Quilting Dictionary Mitered CornerFinishingShare this Facebook Pinterest X WhatsApp Email Copy linkA diagonal, folded corner used in binding (or borders) so the strip turns the corner cleanly instead of overlapping square. Sashing & Cornerstones Mitered Corner Binding Outer Borders & Setting Mitered Corner Binding Fold Folding the binding strip up at 45° and straight back down creates a crisp, professional mitered corner. 45° Mitered Corner Fold Also see BindingBorder