Hello ladies! Wondering if any of you have suggestions on the sizes that couch type pillows come in, in Australia? I have a quilt almost ready for a dear friend in Melbourne that a group of us gals from the college days are making and I'd love to send a few pillow covers in a common size to match. Not the bed kind, but the square decorative kind. In the US, they come in 16" square, 12" square, etc, but I was thinking those sizes might not be the same with the centimeter system? Thank you very much in advance!