i did the winter one because i have a huge tattoo on my wrist but i would have liked to do the summer one because its cuter.
anyway, what i did was go to joann fabrics and buy a pattern for the skirt. if you want you can PM and ill send you the name of it and everything. i just dont have it on me.
then i went to a department store and found this awesome white shirt with a low neck and little gathered cuffs. then i bought and extra yard of the fabric i used for the skirt to make the collar. to do that, i drew up a pattern on a paper bag, cut out the pattern on the folded fabric (to make two identical pieces) i lined it so there wouldnt be any seams, meaning i sewed the two pieces together inside-out then flipped them. then i just attached it to the blouse i bought and made little cuffs for the shirt.
oh! and i bought this stuff. i cant think of what its called because its late and im retarded, but its for hemming and it looks like a cloth ribbon and its really soft and great for stripes. and it comes in a ton of colors.
anyway, PM me if you have any specific questions. pictures of my finished costume are in my gallery.