How many inches of luggage is suitable for a trip to Jeju Island?

Travel

I'm supposed to travel to Jeju Island this weekend, but I don't know how much my domestic travel carrier is, so I have a schedule for 2 nights and 3 days. How many inches of carrier would be good?

I don't know if the plane will open because it snows a lot, but anyway lol

  86 3   8 years ago