The Big Knicker Company makes knickers of all different colours and patterns, ranging in size from 14 to 26 (Australia) and in price from $10-$50 Aud. For conversion to other country sizes go to:
http://www.onlineconversion.com/clothing_womens.htm
I like them to be a bit quirky and different, like putting one colour gusset with another colour knickers or just swapping colours around somehow.
Postage inside Australia is: 1-5 pair = $8.25 and 6-11 pair = $14.00. Overseas postage is whatever the going rate for general postage is.