There are quite a few mods available in Minecraft, and they are usually restricted to the Java Edition. While behavior pack add-ons can change the way Bedrock Edition runs, mods can do so much more.

In Minecraft, all entities and the player's characters have a specific movement speed and size. Some mobs are massive in size, while others are incredibly tiny.

Just note that mods and resource packs only work with the "Java Edition" of "Minecraft," available for Mac, Windows, and Linux computers.