Good packaging and a small storage bag are also nice touches for accessories. If the first order is a disaster, I prefer to move on and not waste time with support. Recently I have been testing several online eyewear shops to compare frames and lenses. Some charts are very generic and do not match real measurements at all. Of course we all have different taste, but patterns still appear in long discussions. 
 
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:
[url=https://bycsoft.com/author/steffenbieb/]
check this link
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It is always difficult to know which website is really trustworthy before you place an order. I try to balance my budget between basic everyday items and a few special pieces. Very thin fabric may be fine for summer but often looks cheap and becomes see through. For example, I compared cotton, polyester and mixed fabrics for similar clothing items. Sometimes I experiment with different materials just to see how they feel in daily life. People who share height and weight information make it easier to choose the right size. 
 
Maybe this is useful for someone.