英和和英

語源

From extra +‎ extra small.

名詞

extra extra small (countable かつ uncountable, 複数形 extra extra smalls)

(especially with respect to clothing)

1. (uncountable) One of several sizes to which an item may be manufactured.

   Synonym: XXS

2. (countable) An item labelled or denoted as being that size.
3. (countable) One who fits an item of that size.

形容詞

extra extra small (not comparable)

1. (especially clothing) That is extra extra small (the manufactured size).
2. Used other than figuratively or idiomatically: see extra,‎ small.