The Jack and Jill Bathroom should be 60 to 100 square feet, but in practice it can be as small as 40-60 square feet. The design must be based on the privacy, accessibility and easy movement. Separate vanity areas and a common toilet or shower compartment Jack and Jill Bathroom is a popular choice of many homeowners. This enables one to have two users who can share the space at the same time. Proper lighting, ventilation and soundproofing are also significant. Sliding/ pocket doors are space savers, and internal locks ensure privacy. The selection of the appropriate layout will make the Jack and Jill Bathroom comfortable but not crowded, and it will be convenient and easy to use.