Clothing sizes: (updated May. 28, 2010)

Alex
 Jasmine
Shirt size 5/S (has a bunch, though! So many shirts!)
Pants size 5T (has a bunch)
Shorts size 5T (could use some)
Pajama size 5T/S Could use some, but is picky
Underwear size 6? (has a bunch - should let him pick them out)
Shoe size 11 (has rain boots, new tennis shoes, but he loves his crocks that he's outgrown
Shirt size 4T
Dress size 4T
Pants size 4T
Shorts/skirt size 4T (has none)
Pajama size 4T
Shoe size 10
Alex likes sports, Transformers, but not Elmo or Buzz Jazzy likes some dresses, but loves to wear socks on her hands.

Here is what the kids look like in their sizes:

Alex in a size 6 shirt and 4T shorts, and Jazzy in a size 4t shirt and 4T skirt.