Barry Horowitz became Girl Scouts of the USA's (GSUSA) chief revenue officer in April 2015, after nearly ten years leading its Girl Scout Merchandise team, which is responsible for product development, wholesale and retail distribution, marketing, and licensing of Girl Scout uniforms and branded products.
2-1/2 feet x 5 feet is the standard bath tub size. 32 inches x 32 inches is the typical size of shower stalls. 2-foot depth is standard for actual space for clothes along a closet wall. 3-foot hallways are standard inside a home. 2-foot deep cabinets in the bathroom are standard. 32-inch doorways are ideal.
You have an old fashioned bathroom vanity at 19 deep which really dont exist in modern times. Modern replacements are 18 deep which are called reduced depth but today everything is 21 deep. 90% of vanity drop in bowl sinks on the market today are 19 wide and 16 deep which would be a cutout size of 18x15.