Decide what size and shape you’d like your flags.
Make a template, either from paper or fabric, and fold it in half. Lay the folded edge of your template onto the folded edge of the fabric you want to use. Pillowcases, scraps of fabric, old tea towels etc all work well for bunting flags! Cut out more flags, in pairs, according to your template.
When you have the desired number of flags, sew them together, right sides facing each other. Snip the fabric out from the tip of the triangle, so that when you turn them through the tips aren’t too bulky. Be careful not to snip any of your stitching!! Now carefully turn the flags inside out.