I have both First Gear HT Air Overpants and the Regular Overpants for winter. My HT Air's I got as a 34" Tall inseam and the knees don't fit where they belong, unless I stuff the legs into my boots, and only in a sitting position. I don't recall ever crashing in a perfect sitting position.
The second pair I got were 32" and they fit a little more snugly than I thought they should. OK, I've got Track Runner Legs, but still... I couldn't imagine them if I hadn't got the Overpant model. Now that I'm used to them, I feel naked if my riding pants are loose. I'd rather the pads stay in one place in a "Get Off". Being a 32, they are slightly shorter, but who are we fooling here... they are either in the boots or over the boots. I really need a 33" or a 32" Tall to be perfect, but this ain't a fashion show.