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What Size Flagpole Retainer Ring Do I Need?

"I need a retainer ring.  How do I know what size to buy?"

We get this question by email, phone, in person, or on Facebook at least several times per week.  Thankfully the answer is simple and straightforward, requiring only a tape measure and few minutes!  Today we are going to show you how to determine what size you need for your particular flagpole.
For most purchases, simply knowing the butt diameter (diameter at the base) will be sufficient, as most manufacturers sell retainer rings by this measurement.  If you don't know yours, here is the formula for determining your flagpole's base diameter:

First things first, you'll only need the bottom portion of your pole and a tape measure.
"Why am I measuring the bottom of my pole?  Why not closer to the top where the retainer ring will actually be?"

Excellent question!  It makes sense that you would want the flag to be close to your pole up top, as most flagpoles are much narrower there than the base.  

The problem with that is, the retainer ring also aids in lowering and raising your flag.  Your retainer ring needs to be wide enough to travel down to where you can reach the grommets!

So now that we know where we need to measure, all we need to do is bust out the measuring tape and find the circumference of the base.
This pole is roughly 23 inches around.  Using the calculator below, we've determined that the butt diameter is around 7".  Enter your circumference measurement to determine your diameter:
Circumference Calculator

Here are some of the options we created for this pole once connected:
Once connected to the bottom grommet, this retainer ring was a perfect fit!  If you are unsure, or wish to customize your retainer length, feel free to contact us!

Come back for our post on how to determine what size counterweight is right for your flag!

Be sure to check out all our customized options for retainer rings in our store.  We can do any color and pattern to match your flag or team colors!