My guess is 12, however perhaps you could cut some newsprint 12 and 18 inch squares, lay them on your floor and get the feel of the size. Thanks for your report on Amtico. We would love to get it, however we can not find a dealer in the Seattle area with a display of Amtico.

I have truly appreciated all your help in getting our project off the ground. Although it is the holiday tomorrow, we haven’t heard from our architect since last Thursday. We originally engaged our architect in February, and it will have been 5 months in the design phase of a 500 sf addition, which basically adds a master bed and bath. For context, it was supposed to take 4 weeks to get through design and on to construction documents. Instead, it has taken us 5 months. It took 4 weeks to provide an initial 2-story design which we liked, then 4 weeks to realize that he hadn’t accounted for the city setback and redesign a 2-story we didn’t like, 3 weeks to deliver a 1-story design without a setback (but that didn’t have a layout that worked), 2 weeks to redraw a drawing that I sent over. I pretty much thought we were done on May 25 and off to construction documents, but used all the extra time this past month to get the bathroom right. Is this typical of the design process? It seems to be taking longer than anticipated, given the scope of work. I still don't think we are on to construction documents, and he indicated this could take another 3 weeks. Appreciate your thoughts on whether this experience is common.

Sorry I'm so late getting back to you. I think that oddly sized fixtures can be off-putting. Many home buyers are looking for an "ideal" and they can't see past that. If the tub is well made and the bath is located where it's most needed a shorter size tub might not be a problem. If the bath will be used by children then its size is less important, but children grow into teenagers. acm voiced a concern I had about the location of this bath to nearby bedrooms. My mistake in calling it water-resistant drywall. It looks like drywall but it's better referred to as tile backer board. It's most often 1/2 inch thick but I have seen a Hardie brand backer that was only 1/4" thick and came in 3 x 5 ft. sections. HERE is a link to more info on these. There are several types with differing properties. On toilet location, I don't think "obstruction refers to the nearest wall or fixture. I think it refers to something directly in front of the toilet. Looking at your floor plan an angled toilet would not have anything in front of it. There might be room between the toilet and the vanity for a waste basket.

If you can go with a different shape you'll have more options: 14" x 15.5" for $189 Mini pedestal sink$159 16” Wide small sink $199 15" petite sink