A full bathroom usually requires a minimum of 36 to 40 square feet. A 5′ x 8′ is the most common dimensions of a guest bathroom or a master bathroom in a small house. If you happen to have this standard-sized small bathroom, there are two different layouts you can consider. A standard bathroom door is 32 inches (81cm). If you’re working with a really small space you could bring the door width down to 28 inches or 71cm, even down to 24 inches or 61cm as an absolute minimum (note – small doors are should only be used for bathrooms, closets and utility rooms). Sinks will be the most versatile bathroom element with respect to different sizes that can work. Standard tubs are 32 inches wide (81.3 centimeters) and 60 inches (152.4 centimeters) long, but you can find many variations in length, width, depth and shape. Before the widespread use of the metric system, it was generally accepted that the standard bath size in the UK was 5 foot 6 inches in length. Of course, this now Dear readers we present you the Standard Bathroom Rules and Best dimensions for installing the bathroom elements, best location of them, Full bathroom dimensions (bath / shower combination with toilet and sink) x x MSTR bath floor plan 9 x 5 – Master bathroom layout – standard size – shower Bathroom sizes and standard bathroom dimensions by length, width, minimum space. Ideal bathroom size. Free bathroom floor plans for your next remodeling project – for your master bathroom, 2nd Length: 8 feet / 263 cm; Width: 5.9 feet / 180 cm; Area: 48 sq. ft. . Standard Bathtub Sizes: Reference Guide to Common Tubs. Standard measurements to consider when planning your bathroom renovation It is best to contact a professional for exact dimensions for your home.