When a baby zombie picks up a head (creeper, skeleton, zombie, wither skeleton, steve, ender dragon) and equip it, the head renders several times larger than it should.

How to reproduce
1. Spawn a bunch of baby zombies (/summon zombie ~~~ minecraft:as_baby)
2. Drop various mob heads into the mass of zombies
3. Baby zombies with equiped mob heads, will have much larger heads than they should.
4. Optional: Apply slowness to the zombies to get a closer look a them (/effect @e[type=zombie] slowness 500 20 true)

Expected Result
Baby zombies should not have larger than life heads

Video demo: https://youtu.be/KY3HPQpIyss?t=120