Random Mob Sizes Mod (1.21.10, 1.20.1) is a a mod for modpack creators and players who enjoy fine-tuning the game. It allows adjusting the size of mobs that appear in the world. By default, size changes apply only to cows, pigs, chickens, sheep, frogs, and bats.

Features:

  • Let’s you configure mobs, to spawn in different sizes.
  • According to the configuration, the mobs will spawn with random sizes.

Config:

Difficulty-based:

  • Specify different ScalingType or numeric scales per Minecraft difficulty: peaceful, easy, normal, hard.
  • Example: {"type":"difficulty","peaceful":1.3,"easy":1.15,"normal":1.0,"hard":0.75}.

How attributes scale:

  • For scale_health, scale_damage, and scale_speed, possible values are:
    • none – attribute unchanged.
    • normal – attribute scales linearly with size (× scaling).
    • square – attribute scales with the square of scaling (× scaling²).
    • inverse – attribute scales inversely (larger mobs have smaller value).
    • inverse_square – attribute scales as 1 / (scaling²).
  • Example: scale_speed: inverse makes larger mobs move more slowly.

Commands:

  • Primary namespace
    • /random_mob_sizes – the main command for links and config actions.
    • Useful subcommands:
      • config reload – reload the on-disk config into the running game.
      • config reset – reset config to default values.
      • config show – open or display the config file location (singleplayer only).
      • github, wiki, issue, discord, curseforge, modrinth – display links to the mod’s resources.
  • /mobscalings
    • set <entity_type> <scaling> – set a static scaling for an entity. Example: /mobscalings set minecraft:cow 1.5.
    • set <entity_type> <scaling_type> <data> – set a scaling type with JSON/NBT data for that entity (uniform, gaussian, difficulty, etc.).
    • remove <entity_type> – remove a per-entity override so the entity uses the default scaling again.
    • show – list all current scaling entries.
    • show <entity_type> – display the scaling entry for a specific entity.
  • Data format examples
    • Static: {scaling:1.25}
    • Uniform / Gaussian: {min_scaling:0.5, max_scaling:1.5} (you can also include scale_health, scale_damage, scale_speed).

Tips & best practices:

  • Start with conservative ranges (for example 0.75–1.25) and test gameplay impact before using wide ranges like 0.2–5.0.
  • Use gaussian when you want most mobs to stay near default size but still have occasional extreme sizes.
  • Remember to consider how scale_health and scale_damage affect balance – huge mobs with full HP and huge damage can break gameplay if not scaled carefully.
  • Use scaling_overrides for mobs that need special behaviour (for example bosses or mobs with unusual hitboxes).

Screenshots:

Crafting Recipes:

Recommend that you should install Just Enough Items (for mods using Forge) or Roughly Enough Items (for mods using Fabric) to view the full recipes included in this mod.

Requires:

Minecraft Forge or Fabric API

How to install:

Click the following link to view details: How to Install Mods for Minecraft Java Edition on PC: A Beginner Guide

Random Mob Sizes Mod (1.21.10, 1.20.1) Download Links

For Minecraft 1.18.2

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.2, 1.19.1, 1.19

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.3

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.19.4

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.1, 1.20

Forge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.4

Forge Version: Download from Server 1 – Download from Server 2

NeoForge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.20.6

Forge Version: Download from Server 1 – Download from Server 2

NeoForge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.1, 1.21

Forge Version: Download from Server 1 – Download from Server 2

NeoForge Version: Download from Server 1 – Download from Server 2

Fabric Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.4

Forge/NeoForge/Fabric/Quilt Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.6, 1.21.5

Forge/NeoForge/Fabric/Quilt Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.8, 1.21.7

Forge/NeoForge/Fabric/Quilt Version: Download from Server 1 – Download from Server 2

For Minecraft 1.21.10, 1.21.9

Forge/NeoForge/Fabric/Quilt Version: Download from Server 1 – Download from Server 2

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