Quick answer

To measure your condom size accurately at home, use a soft measuring tape to measure the length from the base to the tip, and the girth at the widest part of the erect penis. Then, compare your numbers to a condom size chart to find your best fit.

Why Accurate Measurement Matters

A condom that's too tight can break or cause discomfort, while one that's too loose can slip off. Accurate measurement ensures you get the right size for safety and pleasure.

Most condom sizes are based on nominal width, which is the width of the condom when laid flat. This corresponds to the girth of the penis, not the length alone.

What You'll Need

You'll need a soft measuring tape (like a sewing tape), a ruler, and a piece of string if you don't have a tape. A notepad to record your measurements is also helpful.

Make sure you measure when fully erect, as flaccid measurements won't give an accurate size for condom fitting.

Step-by-Step Measuring Guide

  1. Measure Your Length: Use a ruler or measuring tape to measure from the base of the penis (where it meets the body) to the tip, while fully erect. Ensure the tape is straight along the top side. Common mistake: measuring from the testicles or including pubic bone, which adds extra length. Checkpoint: Record the measurement in inches.
  2. Measure Your Girth: Wrap a soft measuring tape around the thickest part of the erect penis, usually the middle or base. The tape should be snug but not tight. Common mistake: pulling the tape too tight, which gives a smaller girth than actual. Checkpoint: Write down the measurement in inches.
  3. Convert to Nominal Width: Divide your girth measurement by 2 to get the approximate nominal width (in inches). Then multiply by 25.4 to convert to millimeters. For example, a 4.3-inch girth gives a nominal width of about 55mm. Common mistake: using the diameter instead of the width. Checkpoint: Compare your result to a condom size chart to find your girth number.
  4. Match Your Length to a Letter: Use your length measurement to find the corresponding length letter on the MyONE size chart. For instance, a 4.7-inch length corresponds to letter C, while 7 inches corresponds to letter H. Common mistake: ignoring length, but a too-long condom can cause irritation. Checkpoint: Note your fit code, such as 53C or 53H.
  5. Test and Adjust: Try a condom in your calculated size. It should unroll easily, stay in place during use, and not leave red marks after removal. Common mistake: assuming one size fits all. Checkpoint: If it feels too tight or loose, adjust your girth number or length letter accordingly.

MyONE Custom Fit Condoms

  • MyONE® Size 53C My Custom Fit® Condom: MyONE® Classic Condom 53C offers a balanced, tailored fit by combining Girth Number 53 (53mm nominal width) with our shortest Length Letter C (4.7 inches). This size is perfect for people who find regular condoms optimal in girth, but need a much shorter condom length. MyONE® Condoms are crafted from super soft, vegan latex that is hyperthin and extra lubricated. Triple tested for safety. If your measurements show a 53mm girth but your length is shorter than standard, this size prevents bunching and provides a secure fit.
  • MyONE® Size 53H My Custom Fit® Condom: MyONE® Classic Condom 53H offers a balanced, tailored fit by combining Girth Number 53 (53mm nominal width) with Length Letter H (7 inches). MyONE® Condoms are crafted from super soft, vegan latex that is hyperthin and extra lubricated. Triple tested for safety. For those with a 53mm girth and a longer length, this size ensures full coverage without being too tight at the base.
  • MyONE® Size 55E My Custom Fit® Condom: MyONE® Classic Wide Condom 55G is sized for those who need a little more girth and a bit less length. FitCode 55G combines Girth Number 55 (55mm nominal width) with the G Length Letter (6.5 inches). All MyONE® Condoms are crafted from super soft, vegan latex that is hyperthin and extra lubricated. Triple tested for safety. If your girth measures 55mm and your length is around 6.5 inches, this size offers a comfortable, secure fit without excess material.