I have done this before. If you want a 12 inch border, the border strip is cut 12.5". Cut your backing and batting at 14.5". Stack this way: batting, backing (right side Up), quilt, then border (right side Down). Sew with your 1/4" seam and press away from the quilt. Hope this helps.
Last edited by QuiltnNan; 04-27-2019 at 08:04 AM.
Reason: shouting/all caps