TSA Approved Quart Size Bag Dimensions Guide: Travelling Made Easy

An exciting journey is coming close, but you are also confused about the regulations. The hardest question possibly comes from the quart bag you want to carry on plane. 

A quick Google search and you probably already know the TSA-approved quart-size bag dimensions. However, what if it enlarges a little after you put some bottles in? Would it still be allowed if yours is 6.5x9 inches? How in the world can you find a bag with that dimension?

As the title indicates, we guarantee that this article is the only article you need to read further regarding this bland phrase of your journey.

TSA Quart-Size Bag Dimensions: Quick Answer

A TSA quart-size bag is usually around 6 x 9 inches as long as it is clear, resealable and roughly one quart / one litre in capacity. Each liquid container must be 3.4 oz / 100 ml or less, and travellers are allowed one liquids bag per passenger.

As long as the tinted toiletry bag is the approximate dimensions of a quart-sized bag (6" x 9"), you'll be good to go through the checkpoint. Please remember to remove the filled toiletry bag from your carry-on and place it in a separate bin for X-ray screening.

— AskTSA (@AskTSA) March 7, 2025

What Size Ziploc Bag Is TSA Approved?

If you do some research, you will likely stumble upon the 6 inches x 9 inches allowed size. However, some articles mention different dimensions, such as 7 inches x 8 inches. The information is all over the place.

Base on what we found on the official Twitter page of the TSA – AskTSA, it should be around  6 inches x 9 inches.

You might have noticed that the dimensions only have two factors, length and width but no depth. For that reason, in many cases, a lot of bags with the dimension of 6 inches x 9 inches actually have a volume exceeding 1 quart (or 0.946 litres). 

It would be easier if we have an example. For instance, a popular quart-size bag on Amazon comes with a dimension of ‎ 7.7 x 5.9 x 2.8 inches. 

To calculate the volume of this bag, you just need to multiply all the numbers together. For this particular one, the volume would be 7.7 x 5.9 x 2.8 = 127.204 cubic inches. Compared with 1 quart (57.75 cubic inches), our bag is not even close.

The Reality

However, people still have no trouble using bags of similar sizes. Why is that?

Since the TSA has been known to be not too strict on these regulations, don’t be stressed too much. TSA officers often check the dimensions by eyes without actually measuring the bag. Thus, as long as you can fit the bag in your carry-ons reasonably, it is acceptable.

Depending on your airline, the allowed size for carry-on baggage will differ. Make sure to check the policy to purchase suitable cabin bags for your airline. Hence, we highly recommend checking with the TSA before packing. 

CabinZero tips: Make sure to keep this calculation in mind so that your actual bag will be a suitable one.

• Your bag should be within 6″ x 9″’ to be TSA-approved
• Multiply all three dimensions of the bag to see how close it is to one quart (57.75 cubic inches).

What Is the TSA 3-1-1 Liquids Rule?

As the name implies, each passenger can carry 3.4 ounces (or 100 milliers) of either liquid, gels, or aerosols per item. And all of these items must be placed in one single, clear, plastic, and resealable quart-size bag. And each person can carry only one such bag.

For people who plan to carry or have already packed more than this, don’t worry. The mentioned regulations are only applied to stuff you put in your carry-on baggage.

Bigger containers of the same liquids can be packed in checked baggage without any problem since they are not obligated to the same screening process.

This regulation not only helps to prevent terrorism but also helps the TSA officers quickly inspect the types of liquid being brought on board. It is troublesome if you want to carry multiple types of liquid, but it is for safety reasons.

The history

To make the process less intolerable, it is a good idea to shed some light on the history of the regulations.

Back in 2006, there was a failed attempt to blow up several commercial airplanes from the United Kingdom to the United States. Basically, these terrorists carried liquid explosives using common household goods such as sports drinks. Fortunately, their plan was discovered and stopped without causing any significant damage.

In response to this, the TSA soon after introduced the regulations of quart-size bags as part of its 3-1-1 liquids rule.

The Consequences Of Not Following The Regulations

Even though the TSA is not too strict about the size of the bag, they usually check the content carefully. Make sure to pack the liquids in  3.4oz containers and bring no prohibited items. In either case, if the regulations are violated, you will have 2 options.

You can either put them in your checked baggage or, regrettably dispose of them. Depending on the types of your liquids, it might be a huge waste of investment. 

Also, it can be a major problem if you need some liquids available due to personal reasons.

Even if a bag is the right size, if you pack it too full or unreasonably, security may not let it through. That is why it is essential to pack carefully or use proper bags to avoid any problems.

Ziploc Bag vs Reusable TSA Toiletry Bag: Which Is Better?

If you're a once-a-year traveller who just needs something that works, a Ziploc bag does the job. But if you're on the road regularly or you're trying to cut down on single-use plastic, a reusable TSA toiletry bag makes more sense for a long-term call.

Ziploc Quart Size Bags

A simple search on Amazon will bring numerous options for you. Photo by happycreator - stock.adobe.com

Yes, it is just a Ziploc part, but it will do the job. You can probably find it in any supermarket in your area. Of course, the ideal size to choose is 6 inches x 9 inches. However, if you can not find an exact one, a slightly bigger option would not cause any issues. 

Advantages:

• Widely available and affordable
• Easy to find in most stores and online
• Comes with a secure zip-lock closure

Disadvantages:

• May not be as durable as other brands
• Can be prone to tearing or leaking
• Not environmentally friendly.

Reusable TSA Toiletry Bags

A dedicated reusable toiletry bag is a step up in every sense. Built to last, kinder to the environment, and often far more practical once you've actually used one on a trip or two.

Advantages:

• Durable materials mean they hold up trip after trip.
• Most are water-resistant, so a leaky bottle stays contained.
  
• Often come with multiple compartments for better organisation.

Disadvantages:

• A bigger upfront cost compared to a box of Ziplocs.
• Bulkier than a flat plastic bag, which matters if you're going ultra-light.
• Needs a rinse after a spill, rather than just being binned.

What Does Not Need to Go in Your TSA Liquids Bag?

The TSA “liquids bag” is only for travel‑size liquids, gels, aerosols, creams, and pastes that must go in your carry‑on. Anything that is not liquid or similar in consistency does not need to go in that bag at all.

• Solid deodorant.

• Bar soap.

• Solid shampoo.

• Powder makeup.

• Dry toiletries.

• Toothbrush.

• Razor handle.

• Hairbrush.

• Non-liquid toiletry pouch.

• Medically necessary items are generally exempt from liquid limitations.

However, be sure to check with your airlines or airports beforehand.

Tips for packing liquids

1. Use travel-sized containers

Since they are designed to fit in quart-size bags, the process becomes much easier. First, no measure is needed. You just pour your liquids in, and the amount will be suitable. Second, no extra space means no wasted place. Using travel-sized containers always means you can bring more liquids. 

The downside? Pricy, pricy, pricy. You will find, for almost every product, that travel-size containers are more expensive (per unit) than full-sized options. 

2. Plan ahead

Making plans in advance allows you to pack lighter and avoid taking extra goods. Creating a packing list, not only for liquids, is also a good idea so that nothing important would be left behind. 

However, it can be a time-consuming process without any help. Especially, for people who do not travel that much, knowing what you need beforehand might be difficult. So do your homework or call a friend for help. It’s a fun pre-trip activity that you can both enjoy.

3. Consider alternatives 

It would be great if you could find alternatives in solid or powder versions of the liquids you need. This can significantly help you to save space in your quart-size bag. And they do not have to follow the regulations for liquids. Some possible alternatives for you to consider: Toothpaste tablets, sunscreen sticks, solid perfume, etc.

4. Use vacuum-sealed bags

Vacuum-sealed bags can save a lot of space between containers. If you're traveling and don't have access to a specific vacuum or gear to remove the air from some vacuum-sealed bags, it might be a hassle.

Sure, they can pack a lot more, but that is not always a good thing; especially when things get heavy. Remember, you have to carry them in your carry-on baggage.

5. Use packing cubes

Have We Resolved The Confusion? 

It is true that packing for a trip requires a lot of work, but it is crucial to avoid problems. And that is exactly the purpose of this article. We can confidently say that the question about the TSA-approved quart-size bag dimensions is solved.

But what about other ones? Any questions you want us to answer? Leave it down below, we will try our best to help you! Lovely travel! 

Bui Hoang Hai