We recently updated our size codes to be more intuitive, learn more here. Each size code is the combination of a Width Number and a Letter Code. Combine those to get your FitCode. For example, your Width Number could be 53 and your Length Letter is G. Therefore your FitCode is 53G. There are 9 total widths to choose from & 10 different lengths. When you’re using the FitKit, you’ll see those codes directly on the tool. Or you can simply put in your length and circumference measurements here, and the online tool will tell you your MyONE size code. The size codes also keep your specific length and width private.

Latest Stories

Read More

Artist Spotlight: Shanée Benjamin for the ONE® Unity Collection

Artist Spotlight: Shanée Benjamin for the ONE® Unity Collection

The latest ONE® Condoms artist spotlight introduces Shanée Benjamin, a Brooklyn-based illustrator collabora...

Read more

Image of a couple sitting close together sharing a pair of headphones, listening to music and enjoying a relaxed, intimate moment.

Songs That Get The ONE® Community in the Mood for #MasturbationMay

At ONE®, sexual health and wellness is an ongoing, open conversation not just a moment in time. This #Mastu...

Read more

Three snapshot-style photos of ONE® College Ambassador Barrett Clement arranged on a dark green background with the ONE® College Ambassador logo displayed in the bottom left corner.

ONE® College Ambassadors: Highlights From the Spring 2026 Cohort

The Spring 2026 ONE® College Ambassador cohort brought peer-led sexual health education to 59 college...

Read more