The doors when you see in your hand is very small but when you place it down, it will become a giant compare the one in your hand. Also in the third-person, it looks like you are holding it like a candy. But there is nothing to worry about because it's "True Doors" by PATRICKOOL :)
first-person:
third-person:
all of the doors:
How to install
1.Download True Doors.zip 2.Go to %appdata% 3.Copy .zip to /Roaming/.minecraft/resourcepacks 4.Load Minecraft and select the True Doors