This simple addon lets you resize yourself to any size you want!

HOW TO USE

First Beta Api and Creator Cameras must be enabled

next once in the game type "#size 4" in chat, you can put any size you want.
To reset your size type "#size reset"

Putting "nocam" at the end of the command makes it so that your camera isnt locked to 3rd person. (the camera may clip inside the player)

You can also add a players name to the command to change only their size,
or do @a to change all players sizes