What does 大きさ mean?
大きさ is a Japanese noun meaning “size” in English. It is written as 大きさ in kanji, おおきさ in hiragana, and ookisa in romaji. This word is part of JLPT N5 vocabulary.
Example sentence
その運河は150,000重量トンの大きさの船を収容できる。
The canal can accommodate ships as large as 150,000 dead weight tons.