Giant, obviously me…
Shrink: every 6 feet or taller fit woman on the planet… And once all of them are shrunk the busty Barbie body type ones of any height are next.
If I am to list of though…
Celebrities
Sara Jean Underwood(blonde models look like Barbie so…)
Angelica Kenova
Angelina Jolie
Ariana Grande
The many women who have taken the name Daisy Duke
Fictional characters
Tifa Lockhart- busty, would be fun to “break” into being a fashion doll…
Noire from the Neptunia series - Tsunderes always make good resistant “dolls” even after being broken in.
Any Tsundere or Yandere’s - Yandere’s will be shrunk to less than and inch and either kept in a jar or squished. Even at toy size they’d be to dangerous to let out of sight.
Vert also from Neptunia - she is bustier and skinnier than Barbie and has a cocky streak so spending the rest of her life as a guys doll/toy she honestly should have seen that coming in a world where shrink rays or magic exists.
Any giantess above 5 ft tall…(Thing is I like women who are taller than me though…)
Luka and Miku from Vocaloid.
Rin Tohsaka from Fate stay night - Tsundere who cannot figure out technology, sounds like a fun shrinkee but she probably knows the unshrink spell…
Haruhi Suzumiya - she seems like she would both be a fun toy and probably enjoy it just cause it’s not normal.
Aerith FFVII - simply because I’d give her and Tifa to Yuffie to be her toys.
There are more I just cannot think of them