With our Telescoping Flagpoles you can fly up to 6'×10' (however we recommend you don’t fly a flag larger than 5'×8' or 5'x9.5'); a 4×6 flag is ideal for our 20'? and 25'? telescoping flag poles. When you fly two flags in a high wind area we recommend that the first flag should be no larger than 4'×6' and a second should be no larger than 3'×5'.