Do the tutorial on how to use CheatEngine, its built into the app and prompts you to use it at the start, basically just set it to scan "float" value types instead of "4 byte" (default) and scan for an "unknown value" instead of "exact value" (also default), then you increase the slider and scan for increased values, decrease the slider before scanning for decreased values, as well as scanning for unchanged values without moving it, do these scans repeatedly until you can't reduce the collection of values any more (I think there may have been around 50 values minimum when I did it), add all the values to the short list at the bottom by highlighting them all and right clicking, then hit add selected addresses to the address list and sort them by value using the tabs at the top while it is at max size tits on the slider in game, for her tits the max value was 1, so highlight all the 1s, then move move the slider down about a quarter, this separates all the 1s into 2 groups of different values that all match and are less than 1, the bigger ones are the ones that control the tit size, so while they are all highlighted (I think there were around 5 or 6 of them) click the sort by value option 2 more times so they all get put together in the list, then highlight the (Edit:lower not higher) ones only before right clicking them and selecting change value, put 1.5, 2, 3 what ever you like as the new value to make them bigger than the game allows, so long as the value isn't so big that it crashes the game, some games spaz out and then crash if you go too far
Knowing that the max value is 1, you should be able to just put a scan for 1 using the "exact value" scan option while the slider is at max to start off with, instead of unknown value and then scan for changes using increased values, decreased values and unchanged as I mentioned earlier, I also recommend ticking the check box for pausing game while scanning to speed up the scan process
Sorry for the long explanation, but it really isn't that hard to do and can be applied to a lot of games that have character creation as well as obviously for cheating unlimited health, stamina, ammo etc
Edit: change the lower values not higher as seen in this image and only scan for float values