Reviews and how to read them
Short answer: Read the specific reviews and disregard the ones with no content. A review that mentions size and length of use is worth more than ten stars with no text.
What to look for
Reviews that state which size the writer bought and how long the item has been worn. Those two pieces of information make a review usable, because you can compare with your own situation.
What you can disregard
Reviews written the day after delivery say something about the delivery and nothing about the product. See bamboo t-shirts for men.
Patterns rather than single voices
If five different people say the garment runs small, that is information. If one person says it, it may be their body. See bamboo clothing for women and bestsellers.
Frequently asked questions
How many reviews does it take
Ten or more before patterns become reliable.
Are bad reviews a warning sign
Not in themselves. Read what they are about.
Should you write one yourself
It helps others. Mention the size and how long you have used the item.