✔ 最佳答案
Easy, except for the shoes (for me =p ... I always wear solid colours... but closed toe shoes very rarely)
Top... well almost any style goes, right? As long as it's solid colour. I'd choose a t-shirt (or tank top IF it's allowed and the weather's really hot)... with a pretty colour, of course. You could choose a different colour every day.
And wear a skirt. Not-so-short skirts are always cuter than not-so-short shorts ~_^. Length = going down to your fingertips is the rule in most schools, I think, but still short enough to look really cute!!
Shoes... I never wear closed toe shoes when I have a choice (i.e. when the temperature's above freezing), so ehhh... maybe flats like the others said would be cutest?
At least you don't have a school uniform. Actually, I DID have a uniform when I was at school (just a year ago... it seems so long ago now!), but I quite liked it, especially the skirt. Of course, the closed-toe shoe rule irked me a LOT. Hahaha.
My suggestions are pretty rudimentary, so I think you'd be able to buy such clothes anywhere. I don't live in the US so I don't know any of the brands you mentioned but (referring to the answer right above) we do have Gap here in England and they're not bad. I have quite a few clothes from Gap and they're nice and simple but cute enough, just what I like.
(Since you answered my question... yeah, I wear sandals/flip-flops all the time, but I'm just never barefoot unless I'm at home. Maybe it's the Asian in me: always put shoes on outdoors, always go barefoot indoors, it's how we were taught ^.~)