Existing genital extension devices have usually been focused on the size of European males because it was made in foreign corporation.
So, some Korean males whose size is smaller than usual men did not try wearing the device.
But our device is focused on the size for Korean men.
Even some of you whose size is smaller than 3.9 inch after erection can wear it, so their genital will grow until the size of average Korean guys.
If you have a trouble because your size is too small, try erection a little bit to wear, and when tying with silicone band, stretch the band a little to not dislocate it. After that, put one ball first, and then add if you get used to do.