Lilliputian

Lilliputian is a mod that allows for mobs' sizes to be configured. You can either set a specific multiplier of their default size, or a range from which each mob's size will be randomly determined.

By default, no mobs will be affected. You must modify the config in order to notice any effect.

This mod does not allow for player sizes to be changed, and there is no way to change the size of a mob after it has spawned.

Example Config:

I've included a copy of a config file I threw together for my personal pack for people to use as an example in case they're having difficulties with the format.

The best way to find the name of an entity for use in the config is to use tab to autocomplete for the entity type in the vanilla /summon command. Doing so will print all entity names to the log, and most will show up in chat as well.

# Configuration file

all {

##########################################################################################################
# general
#--------------------------------------------------------------------------------------------------------#
# General Options
##########################################################################################################

general {
# Entities on this list will not be resizeable. If you load a world with previously resized entities after blacklisting them, they will return to normal size. [default: [minecraft:giant], [minecraft:elder_guardian], [minecraft:shulker]]
S:"Entity Resizing Blacklist" <
minecraft:giant
minecraft:elder_guardian
minecraft:shulker
minecraft:ender_dragon
minecraft:wither
>

# The entries of this list will be parsed and used to determine the size of newly spawned mobs. You can give a single value per entity, or give an entity a range from which a random base size will be selected.
# format: <entity name>|<basesize> OR <entity name>|<min>-<max> [default: ]
S:"Entity Base Sizes" <
minecraft:villager|0.9-1.025
minecraft:cave_spider|0.875-1.125
minecraft:ghast|0.5-1.5
minecraft:enderman|0.75-1.25
minecraft:endermite|0.875-1.125
minecraft:blaze|0.75-1.25
minecraft:bat|0.875-1.125
minecraft:chicken|0.875-1.125
minecraft:cow|0.9-1.1
minecraft:creeper|0.875-1.125
minecraft:donkey|0.875-1.125
minecraft:evocation_illager|0.9-1.025
minecraft:guardian|0.75-1.25
minecraft:horse|0.875-1.125
minecraft:husk|0.9-1.1
minecraft:illusion_illager|0.9-1.025
minecraft:llama|0.75-1.25
minecraft:magma_cube|0.875-1.125
minecraft:husk|0.9-1.1
minecraft:minecraft:mooshroom|0.9-1.1
minecraft:mule|0.875-1.125
minecraft:ocelot|0.875-1.125
minecraft:parrot|0.875-1.125
minecraft:pig|0.9-1.1
minecraft:polar_bear|0.75-1.25
minecraft:rabbit|0.875-1.125
minecraft:sheep|0.9-1.11
minecraft:silverfish|0.875-1.125
minecraft:skeleton|0.9-1.1
minecraft:skeleton_horse|0.875-1.125
minecraft:slime|0.875-1.125
minecraft:snowman|0.9-1.1
minecraft:spider|0.875-1.125
minecraft:squid|0.5-2.0
minecraft:stray|0.9-1.1
minecraft:vex|0.875-1.125
minecraft:villager_golem|0.875-1.125
minecraft:vindication_illager|0.9-1.025
minecraft:witch|0.9-1.1
minecraft:wither_skeleton|0.9-1.1
minecraft:wolf|0.9-1.1
minecraft:zombie|0.9-1.1
minecraft:zombie_horse|0.875-1.125
minecraft:zombie_pigman|0.9-1.1
minecraft:zombie_villager|0.9-1.025
quark:ashen|0.9-1.1
quark:dweller|0.9-1.1
quark:pirate|0.9-1.1
quark:wraith|0.9-1.1
roots:deer|0.9-1.1
roots:fairy|0.875-1.125
roots:sprout|0.875-1.125
waddles:adelie_penguin|0.875-1.125
biomesoplenty:pixie|0.875-1.125
biomesoplenty:wasp|0.9-1.1
botania:pixie|0.875-1.125
embers:ancient_golem|0.9-1.1
jaff:clownfish|0.875-1.125
jaff:cod|0.875-1.5
jaff:pufferfish|0.875-1.125
jaff:salmon|1.0-2.0
minecraft:mooshroom|0.9-1.1
botania:doppleganger|1.0
botania:pink_wither|1.0
exoticbirds:cassowary|1.0
exoticbirds:duck|0.875-1.125
exoticbirds:flamingo|0.9-1.1
exoticbirds:gouldianfinch|0.9-1.1
exoticbirds:hummingbird|0.9-1.1
exoticbirds:kingfisher|0.9-1.1
exoticbirds:kiwi|0.9-1.1
exoticbirds:lyrebird|0.9-1.1
exoticbirds:magpie|0.9-1.1
exoticbirds:ostrich|0.9-1.1
exoticbirds:owl|0.9-1.1
exoticbirds:parrot|0.9-1.1
exoticbirds:peafowl|0.9-1.1
exoticbirds:pelican|0.9-1.1
exoticbirds:emperorpenguin|0.9-1.1
exoticbirds:phoenix|0.9-1.1
exoticbirds:pigeon|0.9-1.1
exoticbirds:roadrunner|0.9-1.1
exoticbirds:seagull|0.9-1.1
exoticbirds:swan|0.9-1.1
exoticbirds:toucan|0.9-1.1
exoticbirds:vulture|0.9-1.1
exoticbirds:woodpecker|0.9-1.1
exoticbirds:heron|0.9-1.1
exoticbirds:booby|0.9-1.1
exoticbirds:cardinal|0.9-1.1
exoticbirds:bluejay|0.9-1.1
exoticbirds:robin|0.9-1.1
exoticbirds:crane|0.9-1.1
familiarfauna:familiarfauna.deer|0.9-1.1
familiarfauna:familiarfauna.butterfly|0.75-1.25
familiarfauna:familiarfauna.dragonfly|0.75-1.25
familiarfauna:familiarfauna.snail|0.75-1.25
primitivemobs:chameleon|0.9-1.1
primitivemobs:treasure_slime|0.9-1.1
primitivemobs:grovesprite|0.75-1.25
primitivemobs:bewitched_tome|0.9-1.1
primitivemobs:filch_lizard|0.9-1.1
primitivemobs:brain_slime|0.9-1.1
primitivemobs:rocket_creeper|0.9-1.1
primitivemobs:support_creeper|0.875-1.125
primitivemobs:skeleton_warrior|0.9-1.1
primitivemobs:blazing_juggernaut|0.9-1.1
primitivemobs:lily_lurker|0.9-1.1
primitivemobs:mother_spider|0.75-1.25
primitivemobs:baby_spider|0.9-1.1
primitivemobs:trollager|0.875-1.125
primitivemobs:lost_miner|0.9-1.025
primitivemobs:traveling_merchant|0.9-1.025
primitivemobs:dodo|0.9-1.1
primitivemobs:mimic|1.0
lootablebodies:corpse|1.0
>
}

}