Dungeon Master’s Basic Rules - Version 0.3 - Monster Statistics & Types

Aug 29, 2026

Dungeon Master’s Basic Rules Version 0.3 explains how to read a monster’s stat block and what key fields mean during play. It introduces combat-relevant Size categories, clarifying how space scales for Tiny through Gargantuan creatures. The document then describes monster Type as a fundamental trait that affects interactions with spells, magic items, and class features, including illustrative examples across multiple types.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages63

Reading Time2 h 39 min

AccessFree to download

Monsters

Guidelines for Monster Statistics

Statistics (Stat Blocks)

Size

Type

Dungeon Master’s Basic Rules Version 0.3 Credits D&D Lead Designers: Mike Mearls, Jeremy Crawford Design Team: Christopher Perkins, James Wyatt, Rodney Thompson, Robert J. Schwalb, Peter Lee, Steve Townshend, Bruce R. Cordell Editing Team: Chris Sims, Michele Carter, Scott Fitzgerald Gray Producer: Greg Bilsland Art Directors: Kate Irwin, Dan Gelon, Jon Schindehette, Mari Kolkowsky, Melissa Rapier, Shauna Narciso Graphic Designers: Bree Heiss, Emi Tanji Interior Illustrator: Jaime Jones Additional Contributors: Kim Mohan, Matt Sernett, Chris Dupuis, Tom LaPille, Chris Tulach, Miranda Horner, Jennifer Clarke Wilkes, Steve Winter, Chris Youngs, Ben Petrisor, Tom Olsen Project Management: Neil Shinkle, Kim Graham, John Hay Production Services: Cynda Callaway, Brian Dumas, Jefferson Dunlap, Anita Williams Brand and Marketing: Nathan Stewart, Liz Schuh, Chris Lindsay, Shelly Mazzanoble, Hilary Ross, Laura Tommervik, Kim Lundstrom, Trevor Kidd Available for download at [DungeonsandDragons.com](DungeonsandDragons.com) Based on the original D&D game created by E. Gary Gygax and Dave Arneson, with Brian Blume, Rob Kuntz, James Ward, and Don Kaye Drawing from further development by J. Eric Holmes, Tom Moldvay, Frank Mentzer, Aaron Allston, Harold Johnson, David “Zeb” Cook, Ed Greenwood, Keith Baker, Tracy Hickman, Margaret Weis, Douglas Niles, Jeff Grubb, Jonathan Tweet, Monte Cook, Skip Williams, Richard Baker, Peter Adkison, Bill Slavicsek, Andy Collins, and Rob Heinsoo Playtesting provided by over 175,000 fans of D&D. Thank you! Release: November 4, 2014 DUNGEONS & DRAGONS, D&D, Wizards of the Coast, Forgotten Realms, the dragon ampersand, Player’s Handbook, Monster Manual, Dungeon Master’s Guide, all other Wizards of the Coast product names, and their respective logos are trademarks of Wizards of the Coast in the USA and other countries. All characters and their distinctive likenesses are property of Wizards of the Coast. This material is protected under the copyright laws of the United States of America. Any reproduction or unauthorized use of the material or artwork contained herein is prohibited without the express written permission of Wizards of the Coast. ©2014 Wizards of the Coast LLC, PO Box 707, Renton, WA 98057-0707, USA. Manufactured by Hasbro SA, Rue Emile-Boéchat 31, 2800 Delémont, CH. Represented by Hasbro Europe, 4 The Square, Stockley Park, Uxbridge, Middlesex, UB11 1ET, UK. Monsters Guidelines for understanding the information found in a monster’s statistics are presented below. Statistics A monster’s statistics, sometimes referred to as its stat block, provide the essential information that you need to run the monster. Size | A monster can be Tiny, Small, Medium, Large, Huge, or Gargantuan. The Size Categories table shows how much space a creature of a particular size controls in combat. See the player’s D&D basic rules or the Player’s Handbook for more information on creature size and space.
Size Categories
Size Space Examples | | | | --- | --- | --- | | Tiny | 2½ by 2½ ft. | Imp, sprite | | Small | 5 by 5 ft. | Giant rat, goblin | | Medium | 5 by 5 ft. | Orc, werewolf | | Large | 10 by 10 ft. | Hippogriff, ogre | | Huge | 15 by 15 ft. | Fire giant, treant | | Gargantuan 20 by 20 ft. or larger Kraken, purple worm
Type | | | A monster’s type speaks to its fundamental nature. Certain spells, magic items, class features, and other effects in the game interact in special ways with creatures of a particular type. For example, an arrow of dragon slaying deals extra damage not only to dragons but also other creatures of the dragon type, such as dragon turtles and wyverns. The game includes the following monster types, which have no rules of their own. Aberrations are utterly alien beings. Many of them have innate magical abilities drawn from the creature’s alien mind rather than the mystical forces of the world. The quintessential aberrations

FAQs

What is a monster’s stat block used for in the rules?

A monster’s statistics, also called a stat block, provide the essential information needed to run the monster during play.

How do monster Size categories affect gameplay?

Size categories (Tiny to Gargantuan) determine how much space a creature controls in combat, with a Size Categories table listing space and examples.

What does a monster’s Type represent and why does it matter?

A monster’s type describes its fundamental nature and determines how spells, magic items, and other effects interact with it, such as extra damage from an arrow of dragon slaying.

Aug 29, 2026

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