It is no great secret that I am girl who loves garlands and fabric and when the two meet I am in a perfectly happy place.
Step 1 - Starting out -
Choose an array of fabrics (I've used all printed cotton) and make a triangle template out of some cardboard. You can make the triangle as big or as little as you like just keep in mind what will disappear in seams. Cut out plenty of triangles in pairs. Use ribbon or bias tape for the top, you can also make your own bias, but the premade stuff is wonderful.
Step 2 - Make the flags -
Sew up and down the paired triangles (right side of fabric facing each other) with about a 1/4 inch seam, keeping the tops open. Turn flags inside out; I found a paintbrush particularly helpful.
Step 3 - Press and Cut -
Give flags a good pressing and cut away any uneven/shabby looking tops.
Step 4 - Construction -
Choose how far apart you want the flags to hang. I've gone for a 1/2 inch gap. Arrange the flags out over the open bias and carefully pressing as you go pin the flags safe inside the bias. When all flags are pinned sew through bias about a 1/4inch in from the bottom.
And there you have it; easy peasy fabric buntings...