#442-445: Bite-Sized Fillomino

 While they may only be 4x4, this doesn't prevent them from having intriguing deductions.

https://puzz.link/p?fillomino/4/4/j3h4g3h1h2

https://puzz.link/p?fillomino/4/4/22j145l5

https://puzz.link/p?fillomino/4/4/g1i3i3g3g1h

https://puzz.link/p?fillomino/4/4/3k2g3j1g4