OK I took some pics! I tried to include some other objects for sizing purposes. The duffy is one of the smaller ones. And the umbrella is one of the little Totes ones.
This is the large packing cube:
In here I have: 6 dresses, 2 pair of slacks, 1 pair of jeans, 1 pair of capris, 1 pair of shorts, 4 blouses, and 7 t-shirts. I think that's everything. It is stuffed pretty full!
This is the medium sized one:
In here I have: 4 pair of workout pants (cotton ones and not shorts), 4 tank tops, 5 sports bras, and 5 pairs of socks.
This is the small one:
In here I have enough underwear and bras for the week, including stick ons. It's not stuffed... was easy to zipper.
Finally, here is a slimline:
In here I have pajamas (T-shirt and cotton capris), slipper socks, swimsuit cover up, rashguard shirt.
I will say I am not a big fan of the slimlines. When I bought them I got 1 of the multi-size sets (small, med, large) and then the pack of 3 slimlines. If I could do it again I would just get like 1 large, 2 medium, and 2 small. That would be a great set. If I couldn't get it like that I would get 2 of the multi-size sets.
Mine are in pink and my husband's are in green so it's easy to keep out stuff separate. They have SO MANY more colors now - I am jealous that I don't have purple!! Or the paisley ones!
I got these at ebags.com and they are very durable... I'm surprised I haven't popped a zipper with how full I fill them. I've had them several years
ETA: I guess the slimlines are good for fitting into odd areas of the suitcase... but they are a pain to pack clothes in. I bet they'd be better for bathroom stuff, pills, etc.
Also... this makes unpacking on cruises easy as I can just take everything out of the suitcases quickly (in the packing cubes), throw them on the bad, nest the suitcases, and shove them under the bed. Since space is at a premium - it helps not having the big suitcases out!