Choosing the Right Xialla Size — and What to Do If You Got It Wrong

Xialla is sized by circumference, not length. That single fact accounts for most sizing mistakes, because it is not what men expect to measure.

If you would rather not measure at all, order Regular. It fits most men, and if it turns out to be wrong we send a different size free of charge — you pay shipping only, and you do not need to return the original.

How to measure

Measure the circumference — the distance all the way around the shaft — near the base, where the ring sits. A tailor's tape works best. A strip of paper or a length of string marked and then held against a ruler works equally well.

You can measure either erect or flaccid. Use whichever you can do reliably, and read the corresponding column below.

Erect circumference

• Under 5 inches — Slender
• 5 to 6 inches — Regular
• Over 6 inches — Thicker

Flaccid circumference

• Under 4 inches — Slender
• 4 to 5 inches — Regular
• Over 5 inches — Thicker

If your two measurements point to different sizes, or you fall on a boundary, choose Regular.

The ring dimensions

For reference, the inner measurements of the ring itself:

• Slender — inner diameter 0.85" (2.2 cm), inner circumference 2.7" (6.8 cm)
• Regular — inner diameter 0.94" (2.4 cm), inner circumference 2.9" (7.4 cm)
• Thicker — inner diameter 1.14" (2.9 cm), inner circumference 3.6" (9.1 cm)

The ring is soft silicone and stretches considerably. The inner circumference is much smaller than your measured circumference by design — the ring is meant to be under tension. This is why comparing the two numbers directly will mislead you, and why the size chart above is the thing to follow.

Why sizing is not exact

Two men with the same measurement can prefer different sizes. Circumference is genuinely difficult to measure consistently — tape tension, exactly where you measure, and how erect you are all shift the number. Preference varies too: some men want a firmer grip, others find the same grip uncomfortable.

For that reason, treat your first size as a starting point rather than a verdict. We expect a proportion of men to change size, which is why the exchange is free and deliberately low-friction.

Judging the fit once it arrives

Assess the fit while erect, since that is when it does its work.

Too loose if the erection fades noticeably while the ring is in place, or the ring feels slack and does not maintain contact around the shaft. A ring that is not applying compression is not slowing outflow.

Too tight if there is discomfort, numbness, pinching, or any colour change. Discomfort is not a sign it is working. Remove it.

About right if it is snug and noticeable but not uncomfortable, stays in position, and the erection holds while it is worn.

Do not compensate for a poor fit by wearing the device longer. The 30-minute limit applies regardless of size or comfort — see using a constriction device safely.

If the size is wrong

Size changes are handled on the Support page, which you can also reach from the Support link in the main menu.

• Under How can we help?, choose Change size to Slender, Regular, or Thicker.
• In the message box, say which size you have now and whether it felt too tight or too loose. That is all we need.
• Submit the form and we will email you a link to complete the exchange.

The replacement ring is free of charge and you pay shipping only. There is no need to return the original — keep it, or use it while the replacement arrives.

Before you conclude the size is the problem

A device that is not working is not always a sizing issue. Two other causes are more common:

• The pad is not holding. If the adhesive pad lifts, the ring loses its anchoring and slides, and blood escapes with the movement. See the adhesive pad doesn't stick well to my skin.
• Inflow is the limiting factor. If you cannot achieve a firm erection to begin with, a constriction device has less to retain. That is a different mechanism — see our guide to venous leak and erectile dysfunction.

If you are unsure which applies, write to us and describe what happens. It is usually possible to tell from the pattern.