Even with what the package itself says, Jeff decides he wants to go bigger. Far more than what it shows on these values. He opens the "Write your own change" section, and begins typing.
"In this new world, Most forms of underwear do not exist. The only type for down below in existence is diapers, although bras do exist, and they serve a completely different purpose to what they do presently. Skirts and Dresses are more common across girls, allowing easier access to their lower regions"
"Humans heading out in public without underwear on is a normal thing. In fact, Most humans would ordinarily go outside without any form of underwear around their waste; Girls commonly wear bras, however. Even those who are dependent on diapers don't wear them for the most part. However, showing nude areas in public remains seen as it currently is."
"In this new world, girls wearing diapers is not for their own use, but for others. Anybody, male or female, is capable of choosing a girl, and then live inside of the girl's diaper; This features no restrictions, and the girl chosen has to go with it whether they want it or not. The only restrictions are that people cannot live inside their mother or daughters; Beyond this, Any girl goes, including siblings or cousins. Femboys/Tomgirls may also be chosen, depending on if they can visibly pass as a girl at the time one picks them."
"When a girl is chosen, that is when they shall start wearing diapers, signifying this change. The inside of a girl's diaper appears far bigger for those who are inside, yet still fits snugly on the girl wearing it. The inside of a diaper has all of the components for someone to live inside, although it is also possible for those in a diaper to enter inside the girl's body from down there."
"Those without anyone living in their underwear are generally discouraged from wearing diapers, and although this isn't exactly illegal, there are rules that may attempt to prevent this. Of course, even when rules are in place against it, it's possible to avoid having it seen as long as the diaper isn't visible; Diapers are bulkier, making them harder to hide, but without it being visible there is almost nothing to be done to enforce it."
"Anyone with diaper-inhabitants are also not allowed to change their own diapers, nor can anyone else; For as long as someone is living inside, the ones inside have full control over whether or not it gets changed. In addition, humans can exit the diaper at any time they wish without forfeiting the ability to live inside, instead having to willingly choose to leave and find a new place, and a chain can occur with one girl living in a diaper while holding someone else in their own. Note that not everyone is required to live inside another human's diaper."
"As one additional detail, The diaper and it's contents still remain at their full weight. As such, having something too heavy can result in either the diaper sagging down, or the girl wearing it being unable to walk due to it's weight. Diapers falling down in public is punishable in some circumstances, especially in schools, but may be regarded as unintentional or unavoidable some of the time."
"The inside of a diaper can be mostly customized in any way. Those inside can set up individual 'rooms' either on the diaper or on the girl who's wearing it. This includes making a room obscuring usage of the urethra or anus, or even partially or fully inside of any holes in the lower region. Doing so may need to be more reinforced, however, as they can be destroyed by attempting to use their diaper if not careful"
"Sex with diaper inhabitants can be awkward. Although there is no true way it's enforced other than saying it, Those with others living in their diapers are required to keep their diapers most of the way on; Just barely enough to obtain access, and the back has to remain mostly up. The inhabitant(s) can grant permission to take it off for sex, but otherwise this needs to be followed. However, Privacy laws during sex still exist, despite anyone inside the diaper still being able to look up and watch freely; Despite this being technically illegal, nothing can be enforced in this scenario."
"Sex toys can be brought inside, and it's size is determined by who puts it into the diaper. If the girl wearing it reaches in to place the toy, it'll remain full size just as her body, but having anyone else place it in will result in it being adjusted just as humans are. "
He decides this is good enough to start with, and confirms this change. The world around him changes as it takes effect, and he can feel his pants adjust and interact with his genitals as his underwear disappears. He poked his pants a bit, feeling that they are indeed gone, confirming that it worked.