Question: Make your own custom size envelope.
Options:
Get some paper you like that is larger then what you need. Cut it out and fold in half. Sew three sides on your sewing machine. Pick out a stitch you like. Add what you want in the card and sew closed.
Get some fabric you like that is larger then what you need. Cut it out and fold in half. Sew three sides on your sewing machine. Pick out a stitch you like. Add what you want in the card and sew closed.
Answer: Get some paper you like that is larger then what you need. Cut it out and fold in half. Sew three sides on your sewing machine. Pick out a stitch you like. Add what you want in the card and sew closed.