Dick Length = Boob Size
You got hit with a gender-swap beam, turning you into a girl! Your dick length will determine the size of your new boobs.
Trading Rules: If you want a different size, you can trade up or down until you reach your desired size.
Example 1: You got Extra Large but wanted to get Medium. You can reach it by giving two sizes to one or multiple people.
Example 2: You got Small but wanted to get Huge. You can reach it by receiving four sizes from one or multiple people.
Enjoy your new tits!
Flat: Aww, you didn't get anything...Or perhaps you're happy like this! Flat is Justice!
Small: Not much, but still fun to play with! Small is Good for All!
Medium: Perfectly balanced, as all things things should be. Medium is Premium!
Large: Nothing beats getting a handful of these! Large is in Charge!
Extra Large: Your back might get sore sometimes, but it's (probably) still worth it! Oppai is Truth!
Huge: Now we're getting into hentai territory. You'll get some magic to make your boobs lighter, but they'll be hard to manage... Probably too big for most, but has its enjoyers.
Massive: Uh oh... You were "blessed" by the Cow Goddess and gained massive titties! You'll still have magic to make them lighter, but they'll be extremely inconvenient. I'd trade down a size if I were you, but if you enjoy these, then I hope you're happy. These boobs ain't for the faint of heart.