If you're just looking for something for outside the sliding door, just enough to step onto and take off your shoes or boots, then these are good:
http://www.canadiantire.ca/en/pdp/concord-precut-rugs-3-x-4-ft-0684097p.html#.VTBpOZOPyDk

In-store, there are usually slightly nicer (colour pattern wise) variants for a few dollars more.  Two advantages to these are that they dry quickly if thrown over a tree branch or railing, and if they do get terminally dirty or torn, they're not too expensive to replace.

James
Ottawa, ON

> Date: Thu, 16 Apr 2015 17:58:27 -0600
> From: steve@WILLIAMSITCONSULTING.COM
> Subject: Re: Patio mat
> To: vanagon@GERRY.VANAGON.COM
> 
> Hi,
> 
> Given that you are in Canada, I went for "super cheap" ($60.00) and got
> something from Canadian Tire.  Online, they only have blue, but I bought
> mine from the store & got a nice tan one.
> 
> On the Canadian Tire site:
> RV Outdoor Awning Leisure Mat, 6 x 9-ft
> 
> Cheers,
> Steve
> 
> On 16/04/2015 5:01 PM, Ron & Marianne wrote:
> > I am wondering what the list thinks is a good size and price for the patio mat carpet thing that gets put on the ground outside the side door.
> > Ron Mighton
> > Near toronto