Actual humidor capacity?

in Cigar 101
Hey guys! Question about the amount of cigars you can actually put into a humi and still retain a good humidity %...
I know a good "rule of thumb" is to only really fill it to 80% capacity, but is there another way to really know how many smokes you can fit into a box based on size? Also...There's 2 humis I'm looking at...one says "120 ct" and its 15x9.75x6.5 while #2 says its a "100 ct" and he dimensions are 15x10x8. A bit confusing eh?
Hope you lovely people can help me out! Hope you enjoy the upcoming holiday!
I know a good "rule of thumb" is to only really fill it to 80% capacity, but is there another way to really know how many smokes you can fit into a box based on size? Also...There's 2 humis I'm looking at...one says "120 ct" and its 15x9.75x6.5 while #2 says its a "100 ct" and he dimensions are 15x10x8. A bit confusing eh?
Hope you lovely people can help me out! Hope you enjoy the upcoming holiday!
Comments
Da Dum
I have a "100 ct" with very similar dimensions ....
The most I've ever fit in it was 70-75ish (majority of 52-54 RG robustos or toros). And that was after I removed the top tray and bottom dividers.
The humi was definitely "full" at that point ---- if I'd have added any more cigars they'd have fallen out when I opened the lid.