You'll usually "borderline" ok if the height is 29" or less,. For example: 29+20+13=62
What Size Is A 62" Linear Suitcase In Inches?
62 linear inches of luggage (or boxes for shipment) means adding the length, width and heigth of the luggage (or box) together. Example: Luggage is 36" wide, 18" high and 8" deep. 36+18+8 =62