How the word "おおきさ（大きさ）" is translated into English
写真の大きさを変えてください。
この箱はちょうどいい大きさです。
文字の大きさはこれでいいですか。
"おおきさ（大きさ）" is in the lesson "Designer" (Level 43), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,379 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.
