29th August 2008 12:00
I did a hat making course a few years back, only made one hat, but if you look on the inside of the hat you should see like a ribon, think its called petersham ribon, you could buy some cut a length and stitch a circle so the circle is the right size for your mam's head and then stitch that to the other bit of ribon thats already in the hat.
before you stitch it in pin it top, bottom, left,right (if you know what i mean) then the other opposites inbetween these ,this should pull it in evenly, and stitch the two together
you might need a couple of goes to get it right, and you should be able to buy the ribon in hickey or any habadashery
hope this helps