Our condom size calculator works as a girth to nominal width calculator and circumference to nominal width tool: you enter your girth in inches or cm and we give you your nominal width in mm. The formula is nominal width = girth (mm) ÷ 2. That nominal width is the key spec for condom fit and the main factor for safety and comfort.

How to Measure for Condom Size

Accurate measurement is essential for finding the right condom size. Follow these steps for proper measurement:

• Measure when fully erect: Measurements must be taken during full erection for accuracy
• Use a flexible measuring tape: A fabric tape or piece of string works best
• Measure girth around the thickest part: Wrap tape around circumference at widest point
• Measure length from base to tip: Press ruler against pubic bone for accurate length
• Girth is more important than length: Focus primarily on circumference measurement
• Measure multiple times: Take 2-3 measurements and use the average for accuracy

Why Proper Condom Fit Matters

Using the correct condom size is crucial for both safety and comfort. A properly fitted condom provides the best protection against pregnancy and STIs while maintaining comfort and sensitivity during intimacy.

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