Category 3M on Royal Caribbean refers to a specific type of Spacious Ocean View Stateroom, typically found on the newer and larger ships in the fleet, such as the Oasis-class and Icon-class vessels. These rooms are designed for families or groups who want more living space than a standard stateroom but do not want to jump to the price point of a balcony or suite. A 3M room is an "Outside" cabin, meaning it features a large, non-opening window (porthole or picture window) that provides natural light and views of the sea. These rooms usually measure around 211 to 214 square feet, which is significantly larger than the roughly 170 square feet found in standard ocean view cabins. They often include a sitting area with a sofa (which may convert to a bed) and can comfortably accommodate three to four guests. In 2026, these rooms are highly sought after by budget-conscious families who spend most of their time on deck but appreciate the extra "elbow room" and the ability to check the weather and horizon from their own private window without the higher cost of a private veranda.