Browse their selection of bags and write down the Product Code for the bag you are interested in requesting a free sample of:

http://www.polybags.co.uk/shop/shop_c1.htm

Then complete this form to request your free sample. If you are interested, you can request their free Catalogue on this form as well. Change the country to Canada and the form will go through with no problem:

http://www.polybags.co.uk/fm_samp.htm