are the suits standing up? or on their backs?
What poses are the arms in? are the weapons magnitized, or do they stick straight out?
I have many battlefoam trays, and I find NOTHING beats sticking a ruler up to your mini...
Now, I have firewarriors standing up in a tray, this being my favorite troop tray:
http://us.battlefoam.com/necron-69-necron-troop-foam-tray-bfl-2/
It holds almost anything - short guns, longer guns, kroot, vespid, kroot hounds, etc. Love this tray.
For my crisis suits, I made a custom tray for them, all standing up. My guys are magnitized so it works out well.
Best of luck!