Caghyre
Oh and shells:: I think thongs are considered sandals, because you don't just call them "thongs" they are "thong sandals" because if you just said "thongs" you'd probably be talking about the underwear XP
Nah, see that's where cultural differences come into play.
EVERYONE calls them thongs here, and no one says 'flip flops' unless they're from overseas I guess. And I have never ever heard someone say 'thong sandals'. That made me giggle. ^.^
And mostly we say 'g string' instead of 'thong' for the underwear.
My mental picture of a sandal is something with a back, if that makes sense.

But it's just personal opinion/different countries' definitions.