Contact
Write to support@pyxl.pro about a mistake in a figure, a missing size or any question about the site.
Where to write
Email support@pyxl.pro. There is no contact form and no account, so nothing you send is stored on this site.
Before you write
Every figure comes from a rule on the methodology page and from a source in its list, with the day it was checked. Opening them often settles why two sizes differ. A size from any calculator is a starting point, and this site cannot tell you how a particular brand fits.
Reporting a mistake
Name the page, the figure you believe is wrong and, if you can, a published chart or standard that gives the right one. Each report is compared with its source; when it holds up, the data, the page and its date change together.
Replies
Write in English. A message about a figure is compared with its source before anything changes. The site does not give fitting or medical advice, so questions of that kind are not answered.