I first ordered F4 from what the chart said, I’m heavier so I got it bigger. When it arrived it was way too big, I don’t even think it would have shrunk well To fit me, so I returned it and got F3 instead. On that day that I received it I went to JJ and I was rolling with another person who of course was pulling my gi she wasn’t even going hard on me, and all of sudden I heard the stitches pulling apart.. I wanted a lighter gi, but maybe it was a bad idea, I don’t know if it will last a good amount of time.