Municipal building codes may specify the clearance for the proper placement of towel bars, such as 21 inches between towel bar and the toilet.
36 inches seems to be the average height for the placement of towel bars for kids.
Small Bathroom tips:
Measure the length of your hand towel, divide the measurement in half and add two inches. The result is the ideal distance between the counter surface and the top of the towel rack. Place the rack above the counter if possible, as this is helpful for keeping floor drips under control. Choosing the left or right side of the counter is up to you; consider how the rack will appear when viewed. Alternatives to a towel rack may better suit your small space. For example, a shelf above the counter for storing rolled towels, a basket on the counter surface or small-scale decorative coat hooks on the walls can all work well.
Sourc: Where to Put a Hand Towel Rack in a Small Bathroom | Home Guides | SF Gate
Read This Before You Redo a Bath | This Old House
last updated 17 May 2017