Pam Howard answered:
I usually use 1/4" shoulder pads or no more than 1/2". I get them from WAWAK sewing supplies. There are also some beautiful shoulder pads available from Professional Sewing Supplies in Seattle. Hisako does not have a website, you will need to contact her by email. The ones from WAWAK are Ladies uncovered needle punch pads (set in sleeve style) and since they work so well, I have not needed to make my own. The ones Hisako has come in varied shapes (set in, raglan, etc.) I hope that you are able to get some, they are great!