I'm not really sure, but it's about 90-100 short boxes, including magazines.
The largest part of it is DC & Marvel SA & BA, but also other publishers and some GA. Maybe a dozen are CA and whatever else one calls them after BA. I switched from long boxes to short boxes because they're easier to move around. I also got metal shelves on wheels, the kind that restaurants use to store pots and pans on, so it's easy to shift a whole section of my collection if I want. The last time I moved I just rolled them all into the U-Haul.