If you find the party flags for sale too expensive, making them at home is the best thing to do! You can start with some good quality crepe paper or any paper of your choice. Check for something to match your theme or the nature of the party. You can also go for rainbow, so you probably need a little bit of each type to put the flags together. Next, start by cutting a triangle of your size preference. Using this one as a stencil, cut out the rest. You can put around an inch of space between them. Measure the area, and always cut out some more for extras. String them on a good piece of wire of any fibre string to hold them well. You can also paint or draw on them.