Check the size chart for actuall measurements
but from what iv gathered so far, this years jiberish is going to run like normal companies sizes. So, if you normally would by a L crewneck form say nike, you should be fine.
xxxl level one jacket
xxxl bold charcoal
xxxl twisted in black
2xl Blue Dripset.
and maybe if its not sold out by the end of the day, 4xl 88 back in yellow.