Looking at weight is overrated. Unless you're actually massive it usually doesn't matter for space at all. My BMI is over 25 but yesterday, in a normal train,

Looking at weight is overrated. Unless you're actually massive it usually doesn't matter for space at all. My BMI is over 25 but yesterday, in a normal train, I could hardly use my large laptop because my arms are long and my shoulders are wide. My ass fit into the seat without any problems. Also surprisingly, legroom was good.