Area Dimensions A master suite is commonly defined as a bedroom with a private bathroom and a walk-in closet of at least 6 feet by 10 feet and up to 10 feet by 10 feet or greater. A his and hers walk-in closet is common in luxury master suites. A large master bedroom can be comfortable for more than one person if it is well designed. The room should be warm but not too hot, with adequate ventilation. It should also have enough space for a bed, an armoire, a dresser, and some other furniture. A spacious closet is essential for any bedroom to be considered masterful. The size of a master bedroom depends on how much space you need there and what else needs to go in the room. If you are planning to stay in the room alone, then a smaller space can be sufficient. But if you have a family, then a larger room will allow for more storage and will help make your home feel bigger and more luxurious. In fact, research shows that people who have larger bedrooms tend to report being happier than those who don't. Size does not necessarily mean that a larger room is better. Sometimes more space means less comfort. So try to find the right balance between size and comfort when planning the master bedroom. Also consider the use of the room when deciding its size.