How to say “Try fitting your backpack in the baggage sizer before you pay to check it in.” in Japanese
In Japanese
預ける料金を払う前に、そのリュックが手荷物サイズ確認枠に入るか試してみたら?
Azukeru ryōkin o harau mae ni, sono ryukku ga tenimotsu saizu kakunin waku ni hairu ka tameshite mitara?