Customer’s self-reported numbers of penis enlargement results!

Our customers are offered a private online diary, where they can log the number of hours using the product, the traction level and of course the occasional measurement of length. We got access to the ones permitting this (349) and below are the results. We divided them into 3 groups according to their starting length (blue, orange, and green), and we added the results of our own survey (purple).

Interestingly the men who started out with the shortest penises, gained length seemingly quicker (blue) than the men who already had average or above average length. Also we saw that our claims from our own testing are the correct average numbers.

Self-reported numbers are very credible for science purposes, since the men are not motivated to either add or subtract from the truth.

Because of the intimate content of the before and after pictures we analyzed, we chose not to show you these images. Instead, we made a clear penis growth results graph where all the results are shown. Our customers have access to the Jes Extender diary where they can log their treatment results, and some of these customers have granted us access to use their personal data which proves that our claims about the permanent effects of Jes Extender are legitimate. To convince you further about the effectiveness of Jes Extender, we have matched the results from our customers with the results from the BJUI (British Journal of Urology) research. We are happy and proud that all of our before and after results point in the same direction – which once again proves that our claims about Jes Extender are valid. Our customers used Jes Extender to obtain natural permanent results – click here if you want to try it out yourself!


To be 100% sure about our Jes Extender results we did an appeal to a third party researcher. The results from this research are reflective of ours. You can click here to see the research, the clinical tests or the  BJUI Research


The test about penis traction is carried out by multiple doctors from our scientific community. The different trials show us that treatment with the Jes Extender penis extender does enlarge and straighten your penis in both length and girth.

BJUI Research

Jes Extender is also mentioned in research by the British Journal of Urology. This research examined and compared the different penis enlargement methods out there. The results of this research shows us once more that penis extenders, such as Jes Extender, are the only safe and completely natural method for penis enlargement.