I have ordered off of AliExpress probably 20 times. The sizing is not reliable. They have charts to assist you in choosing the right size which show measurements. You have to convert cm to inches, but that's ok. Unfortunately, when you receive the item if the measurements are nothing like what was advertised, you are out of luck.
In addition, of the last 9 items I have ordered, I receive a notice within 3 days that it has been shipped. Then two or three days later I get a note saying the product is no longer in stock or that they don't have it in the color I ordered. Then you have to go through a lengthy process to get your money refunded.