Aluminum poles are my preferences and what I have my guard use. They are 1" in diamameter and 5'.5" to 6'. I prefer the 5'.5" for the height, flexability and creativity with movement we can have with them.
Our silks vary from 36" x 45" to 42" x 54" and in different cuts and shapes. Our poles are taped to match the sleeve of the flag on the pole. ie; yellow with yellow, white with white... We use velcro to fasten the flags to the pole. No tape marks on the flags and a cleaner look to them.
All our poles are weighted with carriage bolts inside. 3" on the top and 2" on the bottom. We tape the bolts with electrical tape so they don't clang.
This year we are using 4' pvc poles for one of our numbers. They are also weighted. The flags are over sized 32" x 54", but we wanted them to be. We like them, one we are executing fast movements, two we are able to dance more with them, three allows us to do more one arm strength moves and tricks. The PVC tube is about the same weight as an aluminum pole although a tad flimsy.
We are also using aluminum T- poles and PVC 10' bungie poles. Not much you can do with them but do add colour and a big impact. The t-pole flag is 3' x 8' and the bungie flag is 5'.5" x 14'. The bungie pole is very flimsy but fun.
Thanks to the Glassmen, we were able to purchas used flags from them. It saved us a lot of money and in turn helped support another organization. We also purchased new flags and had some made for us. EXPENSIVE! In the future, we are more than likely going to stay with buying used flags from a drum corps or another guard. It's a great idea, especialy for money stapped guard.
With that being said... for those folk who are instructors / directors and or connected to a guard / corps / band... you should consider selling your old flags on your web site (descriptions / pictures would be very helpful). It's a way to make a little cash for your group.