ED ring size chart
FirmTech rings come in one adjustable size that fits about 95% of men, up to 5.5 inches (14 cm) of erect girth at the base. There is no size to choose at checkout: the hook-and-latch strap adjusts the tension to your exact size.
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With FirmTech, you do not pick a size. All three FirmTech rings, the TechRing, Performance Ring and MaxPR, fit up to 5.5 inches (14 cm) of erect girth and adjust with a strap. Measure around the base when erect; at 5.5 inches or less, a FirmTech ring fits.
| Erect girth at base | TechRing | Performance Ring | MaxPR |
|---|---|---|---|
| Up to 5.5 in (14 cm) | Fits | Fits | Fits, snuggest |
| Over 5.5 in (14 cm) | May not fit | May not fit | May not fit |
Tension is adjustable on every FirmTech ring, so set it snug but never painful. If the Performance Ring feels loose, the MaxPR is slimmer and snugger. If any ring feels tight, loosen the strap or switch to the Performance Ring. Not sure? FirmTech offers a 30-day money-back guarantee.
Some other brands sell rings in several fits chosen by measurement. If your erect girth is over 5.5 inches, those may suit you better. See our FirmTech vs Eddie by Giddy comparison, or go back to the FirmTech ED ring reviews.
One FirmTech ring size fits about 95% of men, up to 5.5 inches (14 cm) of erect girth at the base. The strap adjusts to your exact size, so there is no size to pick at checkout. To check, wrap a soft tape or string around the base when erect and compare it with 5.5 inches.
More on this in the FAQWhen erect, wrap a soft measuring tape or a piece of string around the base of the penis and measure it. If it is 5.5 inches (14 cm) or less, FirmTech rings fit. If you are unsure, FirmTech offers a 30-day money-back guarantee, and the TechRing is sold with a 30-day risk-free trial.
More on this in the FAQFirmTech offers a 30-day money-back guarantee, and you can start a return online through its returns portal with your order number and email. If your erect girth is more than 5.5 inches, FirmTech rings may not fit, and a ring sold in several sized fits may suit you better.
More on this in the FAQThe MaxPR is the tightest, rated 5 of 5 for tightness by FirmTech. The Performance Ring is rated 3 of 5 (Comfort) and the TechRing 3 of 5 (Secure). Because it is snugger, the MaxPR has a shorter safe wear time of up to 90 minutes, versus up to 12 hours for the other two.
More on this in the FAQYes. All three rings are made from medical-grade elastomer that is phthalate free and latex free. Use water-based or silicone-based lubricants only. FirmTech says not to use natural oil lubricants such as coconut oil or CBD oil with any of its rings, because they are not compatible with the material.
More on this in the FAQLoosen the hook-and-latch strap until the ring feels snug but not tight. If it still hurts, take it off. Pain, numbness or a cold feeling are signs to remove a ring. If you are using the MaxPR, which is FirmTech’s tightest ring, the Performance Ring offers a more comfortable fit.
More on this in the FAQThe FirmTech team answers fit, sizing, HSA/FSA and order questions by email. Order questions get a reply in 1 to 2 business days.
