Quick Answer

Choose a MyONE condom by matching your measured girth to a Girth Number (nominal width) and your length to a Length Letter. The right combination prevents slippage or discomfort.

Why Width Matters More Than Length

A condom that's too tight can reduce sensation and increase the risk of breakage. One that's too loose may slip off. That's why MyONE's sizing system starts with the Girth Number (the nominal width in millimeters). The width determines how securely the condom stays in place, while the length mainly affects how much of the shaft is covered.

How to Read a MyONE FitCode

Every MyONE condom has a FitCode like 64G or 55D. The number is the Girth Number (nominal width in mm), and the letter is the Length Letter (inches of length). For example, 64G means 64mm width and 6.5 inches length. You can mix and match across the range to find your exact fit.

Measuring Yourself at Home

Use a soft measuring tape or a strip of paper to measure the circumference of your erect penis at the widest point. Divide that number by 2 to get your approximate nominal width. For length, measure from the base to the tip. Compare your numbers to the MyONE size chart to find your starting FitCode.

Decision Rules for Choosing Your MyONE Size

  • Start with Girth: Measure your erect circumference, divide by 2, and pick the Girth Number closest to that result. If you're between sizes, try the larger one first—a slightly wider condom is safer than one that's too tight.
  • Then Check Length: The condom should unroll all the way to the base without leaving more than 1–2 inches of rolled material at the tip. If the condom is too long, try a shorter Length Letter. If it's too short, go up a letter.
  • Test and Adjust: Your first FitCode is a starting point, not a final answer. Wear it briefly before full use. If it rolls up, slips, or feels too tight, adjust the Girth Number or Length Letter accordingly. Order a MyONE sample pack to try multiple FitCodes without committing to a full box.

Product Facts

  • MyONE® Size 64G My Custom Fit® Condom: MyONE Size 64G features a 64mm nominal width (the widest Girth Number) and 6.5 inches length (Letter G). If you need a much wider condom that's a bit shorter than standard, this is your best starting point.

    MyONE® Size 64G My Custom Fit® Condom

    MyONE® Size 64G My Custom Fit® Condom

  • MyONE® Size 51F My Custom Fit® Condom: MyONE Size 51F has a 51mm nominal width (one size snugger than standard) and 6 inches length (Letter F). Choose this when regular condoms feel loose and you also prefer a slightly shorter length.

    MyONE® Size 51F My Custom Fit® Condom

    MyONE® Size 51F My Custom Fit® Condom

Who Should Use This Guide

Best for

  • Anyone who finds standard condoms uncomfortable (too tight or too loose)
  • First-time custom fit condom buyers who want a systematic approach

Not for

  • Someone who already knows their exact MyONE FitCode and just needs to reorder