These were terrific!  I did not believe rolling up clothes would make such a huge difference in packing.  These packing cubes from Dot&Dot (all large) were just perfect.  I have one suitcase that just meets the 61 L+W+D and I easily fit all 4 packing cubes.  Having these allowed me to pack for 5 people for an 8 day trip including dress clothes and shoes for a wedding. Plus it was nice knowing TSA wasn't necessarily rummaging through all our clean clothes. Did not have to do laundry!