You can purchase a metal yard banner/flag stand at a home improvement store such as Lowes or Home Depot or you can purchase them at most garden shops or hobby shops.
The measurement for your yard flag will depend on the size of the metal stand that you purchase. For an example, I have a hanger from my lamp post so my top pocket is large. Nylon does not soak up the dirty air but it has a tendency to pucker due to the tight density. Therefore, I use a heavy weight cotton. See our designs at Yard Flags.
Supplies: Metal yard banner/flag stand – 3/4 yard heavy white cotton or nylon – small dowel
Cut a piece of material 22 inches long and 15 inches wide. (of course, the width will depend on how large your metal rod is.
Serge all edges. Press under 1/4″ on the sides and turn under and stitch down.
Press a 1 3/4 hem on top (again this will depend on how large the rod for your metal stand is). Roll serged edge under and Stitch down.
Press a 3/4″ hem on bottom or whatever size dowel you have. Roll serged edge under and stitch down. On one end stitch the pocket closed so after your design is finished, you can slide your dowel in and it won’t fall out the other side. This will weight down your yard flag.
Hoop prepared flag on water soluable wash away fabric. Applique and embroidery the design. Cut the wash away close and run the flag under warm water to remove the remaining stabilizer. Insert a dowel in the bottom pocket and hang up on your metal stand in your yard and enjoy.