Medium creatures occupy a 5 foot space and can reach 5 feet both horizontally and vertically.
Size | Space | Reach (Tall) | Reach (Long) |
| Tiny | Less than 5 feet | 0 feet | 0 feet |
| Small | 5 feet | 5 feet | 5 feet |
| Medium | 5 feet | 5 feet | 5 feet |
| Large | 10 feet | 10 feet | 5 feet |
| Huge | 15 feet | 15 feet | 10 feet |
| Gargantuan | 20 feet or more | 20 feet | 15 feet |