As of 2015, checked bags on Spirit Airlines flights may be no larger than 62 linear inches, including handles and wheels. The maximum weight for checked bags on Spirit Airlines flights is 40 pounds.
Spirit Airlines considers bags exceeding these measurements to be oversized baggage and charges a corresponding baggage fee. The airlines do not accept any luggage larger than 80 linear inches in total dimensions or weighing more than 99 pounds.
Carry-on baggage may be up to 22 inches by 18 inches by 10 inches, including wheels and handles. Spirit Airlines allows one small carry-on item per passenger, which may not exceed 16 inches by 14 inches by 12 inches, including handles and wheels.