[IC] Chapter 2-5: You're whirling 'round...

[Silent Giant]

There is a permanent shrink everyting spell (like shrink item) and the affected object/subject can be shrunk and expanded an indefinite number of times, , but only by the original caster.
Objects changed by a shrink item spell can be returned to normal composition and size merely by tossing them onto any solid surface or by a word of command from the original caster. So the shrinked part remained shrinked but inside.