I watched a video on you tube the other day - and this guy was packing enough clothes for a very long trip into a carry on.
I didn't beleive it so I tried what he did - and it worked.
I got 3 pairs of casual slacks, 2 pairs dress pants, 2 pairs of jeans, three button up shirts, 2 tank tops, 5 dressy tops, 3 t shirts, 2 long sleeved knit shirts,3 nighties, one housecoat, 16 pairs of underwear, 2 bras, 6 pairs of socks and a pair of sandals in a 22" carry on. And still had room in the outside pockets for makeup and toiletries.
Amazing - but things would have to be ironed once you unpacked.