What size should a carry on luggage be on Delta airlines?

https://www.seatguru.com/airlines/Delta_Airlines/baggage.php

Quoting from link above:

"Delta Airlines (DL) allows 1 carry-on bag and 1 personal item (purse, briefcase, laptop bag) per passenger fee free.
Carry-on should not exceed the following size and weight restrictions:

• 45 linear inches (22 x 14 x 9 in) or 115 centimeters (56 x 36 x 23 cm) including handles and wheels.
• Fit in the overhead bin or under the seat in front of you.
• Personal item should be of proper size to fit under the seat in front of you
• A jacket, umbrella, diaper bag, duty free items, and assistive devices (wheelchairs, walkers, crutches, strollers, child restraint seats, etc.) do not count towards your carry-on allowance.

NOTE: Bulkhead seats do not have under seat storage, therefore, all carry-on baggage must be stowed in the overhead bin during take-off and landing."

hi Caryl.
A. Actually, the official limit is 3.4 ounces, or 100 ml. You may carry as many containers as will fit in a one-quart clear plastic "zip" bag
What size carry on for Allegiant Air? (22.9 cm x 35.6 cm x 55.9 cm). This measurement includes wheels, pockets, handles and decorations. The carry-on bag must be placed in the overhead compartment. All baggage must accompany a passenger on the flight.

Checked and Carry-on Bag Information ' Allegiant Air

https://www.allegiantair.com/baggage-1 Search for: What size carry on for Allegiant Air?

How many ounces can you take on carry on in Alligiant airline Google Search

Check the airline site for information about baggage. The direct answer to your questions: 1) Depends on the airlines 2) Depends on the airlines.

Two sites that offer tables covering many airlines and baggage are below.

http://www.wikihow.com/Pack-for-Air-Travel

What you can put in the bags:

https://www.smartertravel.com/2012/01/31/10-things-you-should-never-pack-in-your-checked-bag/

https://www.tsa.gov/travel/travel-tips/travel-checklist

Below are the two sites regarding fees and size.

Baggage Fees and Packing Tips FareCompare

https://travel-made-simple.com/carry-on-size-chart/

Right Size for Carry On Luggage Consumer Reports (2015)

I like the Lonely Planet guides.

To both questions, "It depends on the airline."

While there are standard baggage sizes across some of the major carriers, it is prudent to check the airline you will be traveling upon regarding luggage fees, size allowances, and just what can be carried on and what must be checked. Plus, you have to know what you may carry in carryon luggage, what you can not take, and what can not be carried in checkin luggage. And weight is a factor as well.

The common standard seems to be one suitcase of 23kg in weight for the standard class ticket. There seems to be an upper limit of 32kg on excess baggage ( the total weight of the luggage).
On some airlines the excess above 32 kg is deemed as cargo and has to go by a cargo plane .
suggest that you look up the particular airline web page you are using and looking up their bag limits to be absolutely certain !

as size limits on the suitcase also may apply.

Weight is very important on aeroplanes as too much weight means the plane does not achieve sustained flight at take - off .

look at your airlines carry rules-- mine wont allow in carry on OR checked luggage

Most airlines do not allow passengersto carry weapons in carry-on luggage. Nunchucks may be allowed, by someairlines, in their checked luggage.