RealSize

RealSize gives Minecraft mobs more believable proportions. Bees become tiny, spiders shrink, and iron golems stand taller. Models and hitboxes resize together, so smaller mobs can fit through gaps they couldn't before.

Sizes apply automatically to existing mobs and new spawns. Use the defaults or set your own rules for vanilla and modded mobs.

Tiny bees buzzing through a forest clearing.

Smaller spiders. Easier to miss, harder to keep out.

Even aquatic mobs aren't safe from their real size.

Tiny frogs settling in along the shoreline.

A few land mobs enjoying their new proportions.

Don't like our sizes? Choose your own.

The defaults are only a starting point. These next two screenshots use custom settings.

For anyone who thought spiders weren't big enough already.

Or take things in the other direction with miniature polar bears.

After your first launch, open config/realsize.json on the server or in your single-player installation. Change or add entries under entityScales:

"entityScales": {
  "minecraft:spider": 1.4,
  "minecraft:polar_bear": 0.3
}

This is a section of the file, not a replacement config. 1.0 means normal size; smaller values shrink mobs and larger values enlarge them. The floor, hostileFloor and cap settings limit the result, so raise cap for truly giant mobs. Leave enough room before enlarging mobs in pens or buildings.

Run /realsize reload as an operator to apply your changes without restarting. Loaded mobs update immediately; others update when their chunks load. Mobs without a matching rule stay unchanged.

See the configuration guide for all options, default sizes and entity-tag rules.

Installation

For Minecraft 26.3, install RealSize and Fabric API with Fabric Loader 0.19.5+ and Java 25+. Use Fabric API 0.162.0+26.3 or a later compatible release. Older Minecraft builds are available under Versions.

• Single-player: put both JARs in your Fabric client's mods folder.
• Multiplayer: install both on the server. Players don't need RealSize to join.
• Optional client install: keeps tiny mobs visible farther away and adjusts walking animations to their size. Without it, tiny mobs can disappear at short distances and animations may look uneven. Client-only installation doesn't enable resizing on servers without RealSize.

Upgrading from an older version? Back up your world and config, and remove the old JAR. Older releases saved permanent size changes; keep RealSize installed until affected chunks have loaded and saved before uninstalling. See the upgrade guide.

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