Oden's CoC was so large that Toki fainted. Wait till they find out that Oden got all of his CoC from Enma's forger, Kozaburo.
Dropping the clown act for a moment, I think there's a legit reason for the Enma size shift, and it's the same reason Zoan's have their clothes grow in size to fit them (SMH we could have gotten nude Queen through all of Wano if it didn't work like this):
I think Nika/Joy Boy "Freed" the world to an extent already.
We know Awakening affects the environment around you. What if Joy Boy or Nika were so powerful, they were trying to Awaken the entire World to their Fruit, liberate the whole world?
This would explain why the One Piece world is so damn WEIRD to begin with: it's literally the Nika Fruit stretching reality. Enma isn't "shrinking" so much as it's stretching/compressing.
But, Joy Boy/Nika failed to full Awaken the world, so it's very weird, but not fully Gear 5 crazy. Luffy needs to push his Awakening all over the world to fully "liberate" it from Imu.
Think there's a chance Luffy actually breaks out of the manga and meets Oda?

Dropping the clown act for a moment, I think there's a legit reason for the Enma size shift, and it's the same reason Zoan's have their clothes grow in size to fit them (SMH we could have gotten nude Queen through all of Wano if it didn't work like this):
I think Nika/Joy Boy "Freed" the world to an extent already.
We know Awakening affects the environment around you. What if Joy Boy or Nika were so powerful, they were trying to Awaken the entire World to their Fruit, liberate the whole world?
This would explain why the One Piece world is so damn WEIRD to begin with: it's literally the Nika Fruit stretching reality. Enma isn't "shrinking" so much as it's stretching/compressing.
But, Joy Boy/Nika failed to full Awaken the world, so it's very weird, but not fully Gear 5 crazy. Luffy needs to push his Awakening all over the world to fully "liberate" it from Imu.
Think there's a chance Luffy actually breaks out of the manga and meets Oda?