Fit guide
ED ring size chart and fit guide
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FirmTech rings come in one adjustable size that fits up to 5.5 inches (14 cm) of erect girth, so there is no size to choose.
What size ED ring do I need?
For FirmTech rings, you do not need to pick a size. The Performance Ring, MaxPR and TechRing all fit up to 5.5 inches (14 cm) of erect girth, which FirmTech says covers 95% of men, and the hook-and-latch tension adjusts to your exact size. If it does not fit, the 30-day money-back guarantee applies.
FirmTech ED ring size chart
| Ring | Sizes | Fits erect girth | Tightness | Adjustable |
|---|---|---|---|---|
| Performance Ring | One size | Up to 5.5 in (14 cm) | 3 of 5 (comfort) | Yes, hook-and-latch |
| MaxPR | One size | Up to 5.5 in (14 cm) | 5 of 5 (tightest) | Yes, hook-and-latch |
| TechRing | One size | Up to 5.5 in (14 cm) | 3 of 5 (secure) | Yes, hook-and-latch |
How do I measure for an ED ring?
Wait until you are fully erect.
Wrap a soft tape measure or a piece of string around the base of the penis.
Mark where the string meets, then lay it flat against a ruler.
If the measurement is 5.5 inches (14 cm) or less, FirmTech rings fit.
Getting the fit right
What a good fit feels like
A FirmTech ring should feel snug and secure but never painful. The peno-scrotal design puts one loop around the base of the penis and one behind the testicles, which spreads pressure evenly instead of concentrating it in one band. Set the latch, then loosen it if you feel pain, numbness or coldness. Because the rings go on while soft, you can set the tension discreetly ahead of time.
Choosing tightness, not size
With one size for every ring, the real choice is how tight you want it. The Performance Ring is rated 3 of 5 for tightness and suits most men. The MaxPR is slimmer and snugger, rated 5 of 5, with a shorter 90-minute wear limit. If your girth is above 5.5 inches, FirmTech rings are not the right fit; contact FirmTech or your doctor about other options.
Common questions
Short answers here. Every question is answered in full on the ED ring FAQ.
Is there an ED ring size chart?
FirmTech rings do not need a multi-size chart because they come in one adjustable size. The number that matters is erect girth: if the circumference at the base of your erect penis is 5.5 inches (14 cm) or less, the Performance Ring, MaxPR and TechRing fit. The size guide on this site has a simple chart to check where you fall.
Read this answer in the FAQWill the Performance Ring fit me?
The Performance Ring fits up to 5.5 inches (14 cm) of erect girth, the same limit as the MaxPR and TechRing. FirmTech says its one-size TechRing fits 95% of men, and all three rings share that 5.5 inch limit and adjustable tension. If a ring does not suit you, FirmTech offers a 30-day money-back guarantee.
Read this answer in the FAQHow do I measure for an erection ring?
When erect, wrap a soft tape measure or a piece of string around the base of the penis. If you used string, mark where it meets and measure it against a ruler. A result of 5.5 inches (14 cm) or less means FirmTech rings fit. Measure at the base, where the ring sits, rather than around the middle of the shaft.
Read this answer in the FAQIs the Performance Ring tension adjustable?
Yes. The Performance Ring uses a hook-and-latch design with adjustable tension, so you control how snug it feels. FirmTech rates it 3 out of 5 for tightness, described as comfort. If you want a firmer hold, the MaxPR uses the same design in a slimmer, snugger form, rated 5 out of 5 for tightness.
Read this answer in the FAQWhat if the ring does not fit?
FirmTech offers a 30-day money-back guarantee, so if a ring does not meet your expectations for any reason, you can return it. Start a return through the returns portal linked from getfirmtech.com with your order number and email, or contact customer service. FirmTech replies to order and warranty requests within 1 to 2 business days.
Read this answer in the FAQWhat should I do if a ring feels too tight?
Loosen or remove it right away. A ring should feel snug and secure, never painful. With the Performance Ring you can unhook the latch and set a lower tension. If even the loosest setting feels uncomfortable, stop using it and speak to a doctor, and remember FirmTech’s 30-day money-back guarantee if the ring is not right for you.
Read this answer in the FAQ