1. extra extra large - Noun
2. extra extra large - Adjective
(countable) An item labelled or denoted as being that size.
(countable) One who fits an item of that size.
Used other than figuratively or idiomatically: see extra, large.
(uncountable) One of several sizes to which an item may be manufactured.
Synonyms: XXL, 2XL
(especially clothing) That is extra extra large (the manufactured size).
Source: en.wiktionary.org