You’re at the gate, eyes darting between the flight attendant and your bulging suitcase. “Does this fit?” you wonder, praying it meets Southwest’s carry‑on requirements. We’ve all been there—anxiety rising as others sail through security unhindered. But what if you could pack with confidence, knowing your bag’s dimensions and features tick every box?

Southwest Airlines allows one carry‑on per passenger measuring up to 10 × 16 × 24 inches (including wheels and handles), plus one personal item. Soft‑sided bags can compress slightly, but you must include all protrusions in your measurements. No weight limit is enforced, but oversized or overweight items may incur gate‑checked fees. Understanding these rules helps you choose the right bag and packing method for stress‑free travel.

Last summer, my colleague Jenna bought a sleek spinner carry‑on only to realize at boarding that her “expandable” sides doubled its width—she had to gate‑check it and wait 20 minutes after landing. After that fiasco, she switched to a custom‑designed bag with reinforced panels and exact Southwest dimensions. No more surprises. If you’re ready to pack smarter and avoid those cringe‑worthy moments, read on.

What Are Southwest Airlines’ Carry‑On Size Requirements?

Southwest Airlines permits one carry‑on bag per passenger measuring no more than 10 × 16 × 24 inches (height × width × depth), inclusive of wheels, handles, and straps. Bags exceeding any dimension must be checked; fees apply only if checked at the gate. These rules ensure overhead bins accommodate all luggage and that boarding remains efficient.

Airlines standardize carry‑on dimensions to balance passenger convenience and aircraft space constraints. Southwest’s 10 × 16 × 24‑inch rule reflects overhead bin sizes across their fleet—Boeing 737 models. Let’s break down why each dimension matters:

1. Height (10 inches): Measured from the bottom of spinner wheels or bag base to the top of handles (collapsed). Why it’s critical: Ensures the bag clears overhead bin height without tilted insertion.
2. Width (16 inches): Side‑to‑side measurement at the widest point, including side handles and pockets. Real‑world note: Overstuffed side pockets (e.g., water bottles) add inches, so pack sparingly.
3. Depth (24 inches): Front‑to‑back dimension measured from the bag face to wheel back. Why it’s generous: Allows room for shoes or folded jackets, but beware “expandable” gussets when deployed.

Why Include Wheels and Handles?

Many travelers measure only the fabric section, forgetting wheels and handles. Doing so invites gate‑check fees when gate agents spot the true size. Always measure with everything extended exactly how it will stow.

Soft‑Sided vs. Hard‑Shell: Compression Myth

Soft‑Sided Bags: Some flexibility allows slight compression under bin weight—perhaps up to 1 inch per side—but don’t rely on it.

Hard‑Shell Bags: Rigid dimensions require precise adherence to the 10×16×24 rule.

International Comparison

Southwest’s dimensions align closely with other U.S. carriers, but differ internationally:

Delta/American: 9×14×22 inches.

European Carriers: Often 21.5×15.7×9 inches.

For frequent fliers, one universal bag rarely fits every airline—thus customizing to Southwest’s specs maximizes domestic travel ease.

How Do You Measure Your Carry‑On to Ensure Compliance?

Measure carry‑on luggage with a tape measure, including all wheels, handles, side pockets, and protrusions, in exactly the same configuration you’ll stow it. Lay the bag flat, extend telescoping handles fully, and measure height, width, and depth at the bag’s widest points. Soft‑sided bags may compress slightly, but always use manufacturer’s maximum dimensions. If in doubt, choose a bag slightly under Southwest’s limit to avoid gate‑check surprises.

Measuring might seem trivial, but accuracy prevents fees and stress:

1. Tools You Need: A retractable tape measure (imperial/metric markings). A flat surface (floor or table). Optional: A friend to hold handles in place.
2. Step‑by‑Step Guide: Step 1: Place the bag on a firm, flat surface. Step 2: Fully extend all telescoping handles exactly as you will stow them (some people leave handles collapsed—don’t). Step 3: Wrap tape around the bag’s highest point for height, side‑to‑side for width, and front‑to‑back for depth. Step 4: Record measurements; if any exceed 10×16×24, the bag fails Southwest’s requirements.
3. Soft‑Sided Flexibility: Understand that soft fabrics can depress under bin weight, but gates measure in uncompressed form. Some designers include gussets that expand under load—measure both compressed and expanded states.
4. Common Measurement Mistakes: Ignoring Pockets: Exterior pockets and bottle holders often add 1–2 inches per side. Overlooking Wheels: Spinner wheels can add significant depth. Misreading Tape: Always start at zero; avoid offset errors common with foldable tapes.
5. Fit‑Check Test: If possible, find an empty overhead bin (at check‑in or gate) and physically test your bag’s fit before departure. Some airports have overhead bin mock‑ups at customer service desks.
6. Table: Measuring Checklist

Accurate measuring is the first step in stress‑free travel. Once you nail this, everything else—bag choice and packing—becomes simpler.

Which Personal Items Are Included Beyond Carry‑Ons?

In addition to your carry‑on bag, Southwest allows one personal item—such as a purse, briefcase, laptop bag, or small backpack—that must fit under the seat in front of you. Maximum dimensions for personal items are not strictly enforced, but common guidelines are approximately 8 × 10 × 17 inches. Examples include women’s handbags, small duffels, or garment bags. Properly choosing and packing your personal item maximizes total carry capacity.

Your personal item is a secret weapon for extra space:

1. What Qualifies: Handbags & Purses: Must tuck under the seat: leather totes, crossbody bags. Laptop Bags & Briefcases: Slim tech cases designed for under‑seat stowage. Small Backpacks & Duffels: If clearly smaller than your carry‑on.
2. Suggested Dimensions: Airlines rarely publish strict figures, but industry consensus is 8×10×17 inches. Measure personal items the same way as carry‑ons—include pockets and handles.
3. Strategic Uses: Essential Items: Wallet, phone, boarding pass, medications. Valuables & Fragiles: Cameras, passports, jewelry—kept within easy reach. Overflow Storage: Place toiletries or souvenirs that won’t fit in carry‑on.
4. packing Tips: Consolidate Tech: Use multi‑pocket laptop bags to hold chargers and headphones. Foldable Totes: Pack a lightweight tote inside your personal item for overflow shopping. Compression Pouches: Keep cables and small items organized.
5. Critical Perspective: Under‑Seat Fit vs. Overhead Bins: Overloading personal items can prevent full under‑seat insertion, forcing gate‑check. Access vs. Space: Balance having essentials close by against creating a bulky, awkward‑to‑stow item.
6. User Scenario Table

Mastering personal item packing makes your journey smoother and keeps you from overstuffing your carry‑on.

Are There Weight Restrictions or Fees for Carry‑On Bags?

Southwest does not impose weight limits on carry‑on or personal items; both must meet size requirements only. However, if bins are full or your bag is oversized (exceeds 10×16×24 inches), agents will require gate‑check at no additional fee. Checked‑bag fees then apply upon arrival. Therefore, size compliance is crucial. While weight isn’t measured, overloading can stress bin maintenance and slow boarding—optimize contents for balanced, manageable packing.

Southwest’s weight‑friendly policy provides freedom—but with caveats:

1. No Formal Weight Limit Unlike some carriers that cap at 15–22 lbs, Southwest focuses solely on dimensions. You can pack heavier items—just ensure you can lift the bag into bins.
2. Gate‑Check Implications Oversized Bags: If your bag exceeds any dimension, you’re asked to gate‑check—no extra baggage fee, but you collect at baggage claim. Security & Boarding: Oversized or overpacked carry‑ons slow boarding and create bottlenecks.
3. Practical Load Limits Even without weight caps, bag materials and handles have maximum load ratings—often around 50 lbs for standard spinners. Exceeding manufacturer load limits risks damage to zippers, handles, or wheels.
4. Cost Comparison Table

1. Critical Reflection Risk of Damage: Overloading may cause wheel failure or seam splits—consider investing in durable bags with high load ratings. Boarding Etiquette: Even if weight is allowed, bring a manageable bag to avoid inconveniencing fellow travelers.
2. Best Practices Test Lift: Before you travel, lift your packed bag into an overhead bin mock‑up. Manageable Size: Aim for under 35 lbs to ensure ease of handling.

Although Southwest’s lax weight policy feels liberating, mindful packing ensures longevity of luggage and smooth boarding experiences.

How Can You Choose the Best Carry‑On Bag for Southwest?

When selecting a carry‑on for Southwest, prioritize exact 10×16×24‑inch dimensions, durable 100% polyester or polycarbonate shells, and features like expansion gussets, 360° spinner wheels, and trolley pass‑through straps. Soft‑sided bags offer slight compression, while hard‑shells provide structural protection. Look for reinforced handle housings, smooth gliding zippers, and internal organizers. Balancing size precision with functional features prevents gate checks and ensures a comfortable travel experience.

Choosing the perfect carry‑on requires balancing dimensions, durability, and usability:

1. Dimension Precision Manufacturers’ Specs vs. Reality: Confirm bags list 10×16×24 inches including wheels and pulls. Tolerance Margins: Select bags a fraction under the limit—e.g., 9.8×15.8×23.8 inches—to account for fabric stretch.
2. Construction Material Soft‑Sided (Polyester/Nylon): Pros: lightweight, compressible; cons: less impact resistance. Hard‑Shell (ABS/Polycarbonate): Pros: excellent protection; cons: rigid, unforgiving in tight bins.
3. Expandability & Compression Expansion Zippers: Add 1–2 inches depth when needed but must be closed before stowage. Compression Straps: Internal belts secure contents and reduce pressure on zippers.
4. Mobility Features Spinner Wheels: Four‑wheel designs allow effortless 360° rotations and upright roll. Two‑Wheel Rollers: Slightly slimmer but require tilt to roll; may fit narrow aisles more easily.
5. Handle Systems Telescoping Handles: Multi‑stage handles adjust to various heights; check lock‑in stability. Trolley Pass‑Through: Allows bag to slide over larger luggage handles—handy for multi‑bag travel.
6. Internal Organization Mesh Dividers & Pockets: Keep shoes separate from clothing; hold toiletries upright. Laptop Compartments: Some carry‑ons include padded computer sleeves—confirm anti‑theft zippers.

Do Soft‑Sided or Hard‑Shell Bags Work Better for Southwest Travel?

Soft‑Sided Bags

Pros: Slight give for overhead bin squeeze; side pockets handy for last‑minute items.

Cons: Less protective for breakables; prone to scuffs and stains.

Hard‑Shell Bags

Pros: Robust protection; easy to wipe clean; crisp dimensions.

Cons: No flexibility in tight spaces; scratches visible on glossy finishes.

Best practice: combine a hard‑shell spinner for fragile gear with a slim soft‑sided personal item for overflow.

Is It Worth Customizing Carry‑On Luggage for Business or Brand Use?

OEM/ODM Benefits:

Logo Placement: Embossed or embroidered brand logos enhance corporate image on the go.

Tailored Features: Add custom pockets for product samples, branded color accents, and specific trolley straps.

Low MOQs: Jundong supports runs from 200 units—ideal for corporate gifts or start‑up retailers.

ROI Considerations:

Brand Visibility: Custom luggage travels with customers, boosting recognition at airports.

Customer Loyalty: Quality branded luggage fosters lasting impressions.

Custom carry‑ons merge function with marketing—travel becomes your moving billboard.

What Packing Strategies Help You Stay Within Size Limits?

Compression packing cubes, garment folders, and mesh organizers help you fit more in a tight 10×16×24‑inch bag. Roll clothes to reduce wrinkles and maximize space, tuck socks into shoes, and layer heavier items at the bottom. Use toiletry bottles under 3.4 oz in a clear pouch. Balance weight front to back to avoid tipping. By strategically placing bulkier items near wheels and slimmer layers above, you optimize every cubic inch.

Smart packing leverages every inch without breaching size limits:

1. Compression Packing Cubes Function: Zipper‑compression removes air from folded garments—up to 30% more space. Tip: Group items by type—e.g., tops in one cube, bottoms in another—for easy access and weight balance.
2. Rolling vs. Folding Rolling: Ideal for T‑shirts, thin pants—eliminates creases, flexible shapes. Folding: Better for structured items like dress shirts—use a garment folder to maintain crispness.
3. Shoe Packing Hacks Inside & Out: Place socks or underwear in shoe cavities to utilize dead space. Separate Bag: Store shoes in a compact wipe‑clean pouch to keep clothes spotless.
4. Toiletry Organization Clear Zip Pouch: Meets TSA requirements for liquids; place at the top for easy removal. Reusable Bottles: Fill 3.4 oz silicone bottles with shampoo, cleanser, and lotion.
5. Weight Distribution Bottom‑Heavy Packing: Place heavy shoes and electronics near wheels—prevents tipping when standing. Top‑Light Packing: Softer, lighter clothing at top for quick reach.
6. Table: Packing Strategy Comparison

How Can You Maximize Space Without Exceeding the Size Limit?

Layering Technique: Place flat items (chargers, documents) against bag walls, roll bulk in center.

Modular Dividers: Use adjustable dividers to compartmentalize and compress smaller sections.

Accessory Pouches: Clip pouches to interior D‑rings, freeing floor space.

With disciplined packing, even a fully loaded carry‑on can breeze through size checks.

Do Southwest’s Carry‑On Rules Differ for International Flights?

Southwest’s 10×16×24‑inch carry‑on limit applies to all flights, domestic and international. However, partner airlines on international itineraries (e.g., Volaris, WestJet) may enforce different limits—often tighter (9×14×22 inches) or weight caps (15 lbs). When connecting, verify each carrier’s rules and pack to the strictest requirement. In multi‑carrier trips, smaller, adjustable luggage ensures compliance across segments.

International travel introduces varied baggage rules:

1. Southwest’s Uniform Policy Applies on codeshare and direct international routes. Guarantee of consistent carry‑on allowance when traveling solely on Southwest metal.
2. Partner Airline Rules Volaris (Mexico): 9×14×22 inches, plus 10 lbs limit. WestJet (Canada): 21.5×15.5×9 inches, no strict weight but must be liftable by one hand. Copa/VivaAerobus (Central America): 22×16×10 inches, 17 lbs limit.
3. Impact on Packing Dual‑Compliant Bags: Aim for maximum dimensions accepted by strictest partner. Adjustable Designs: Bags with removable sleeves or compression panels can shift between sizes.
4. Table: International Carry‑On Comparison

1. Critical Perspective Bag Complexity: Building a kit with two adaptable carry‑ons adds cost and bulk. Travel Frequency: Frequent international travelers may invest in ultra‑light, adjustable luggage; occasional fliers can rely on single Southwest‑sized bag and pay occasional fees.
2. Best Practices Before You Fly: Check each carrier’s website for updates. On‑Trip Flexibility: Carry a small collapsible duffel inside your carry‑on to shift items if needed.

By planning for the most restrictive limits, you ensure seamless transitions across every leg of your journey.

Ready to Customize Your Southwest‑Compliant Carry‑On?

Avoid gate‑check stress and travel with confidence. Jundong’s 20+ years of luggage manufacturing expertise offers custom carry‑on solutions precisely at 10×16×24 inches, with features like spinner wheels, reinforced handles, and branded accents. Our low MOQs, free design support, and rapid prototyping make it easy to launch your corporate or retail line.