If the embroideries are on canvas, and you want them in a frame, they should be framed by a specialist in needlework framing. You could try to do it yourself by cutting a piece of thin board, leaving a border of approximately an inch all round. Then you iron the embroidery on the wrong side and make sure it is completely dry. Lay it centrally over the board and turn it over, then sew each of the opposite sides together, to tighten the canvas. When it is taut all the way round you can put it in a picture frame. You can look on YouTube for a better idea of how to do this.