References to this series of web pages have been showing up in several places on Facebook and elsewhere, so we tracked it down and it turns out to be a remarkably detailed website with multiple pages and instructions on "How to Make a Yukata", by Amparo Bertram, apparently while a student of University of Michigan and living in Japan.
As we are not makers of kimono ourselves, not sure if we should recommend this site, but the sources cited lend it credibility.
As so many of our customers and fans are into this sort of information, we wanted to share it here. Later we'll probably put it into the appropriate FAQ section of our website, hopefully with some expert opinions of others as to its quality as a source.
Below is the introduction text on the author's main page on umich.edu:
How To Make a Yukata
So, for those of you with expertise in such things, please let us know (in comment here or by email/contact button) what you think of this guide to making a yukata. It is replete with links and very detailed instructions. Let us know if you would recommend this page or not, and we can add ratings to the page when we put it as a permanent item in our website FAQ pages.