XXL
I'm a size 6 and I bought both XS and S and didn't really notice much difference between the two.
I ordered an XL, but they sent an XS.
SMART Vocabulary: related words and phrases Extremely small
atomized
be knee-high to a grasshopperidiom
bitsy
exiguity
exiguous
imperceptible
indiscernibly
infinitesimal
infinitesimally
irreducible
irreducibly
miniature
minuscule
slimly
slimness
subatomic
ultra-small
ultra-tiny
vanishingly
weeny
You can also find related words, phrases, and synonyms in the topics:
Clothing - general words