Go to Google Images, search for the shape you are looking for. Right click on a suitable image, and select 'Copy'.
Open a blank Word document and paste the image into it. Now you can 'stretch' the image to make the shape as big as you need it. Then once you have the right size, copy it again within Word and paste it over and over to your hearts content. Print once and then photocopy it if you want a lot....photocopying is cheaper than using up your home ink cartridge (unless you print it at work!!! :wink: )