If anyone has long term experience with certain online shops, I am always curious to read it. Some charts are very generic and do not match real measurements at all. Reading comments with real body photos is one of the best ways to check sizing. I also like when stores show real photos without heavy editing or strange angles. Many people do not mind waiting if they understand what is going on.
If anyone is interested in real user experiences, I sometimes write short notes about the shops I test.
You can find one of the pages here:
click here
Online shopping will always have a bit of risk, but experience makes it easier. From my experience, communication with the store can tell you a lot. I try to look for real photos of the insoles and soles, not only the outside of the shoe. Nobody wants pretty shoes that hurt after ten minutes of walking. I also pay attention to return policy and customer service response time. Many people do not mind waiting if they understand what is going on.
Just sharing my personal feedback.