BagSmart Duffel Bag Size Comparison – Best Personal Item for Travel If you're looking for a carry-on that actually fits under the seat, this BagSmart duffel is it. I compared both the medium and large sizes — both work, but only one passed the gate test without a second glance 👀 These are perfect for moms, weekend trips, or anyone flying with a personal item only. Tons of compartments, sleek design, and yes — they fit under Spirit and Delta seats. 🙌 📏 Medium vs. Large size shown 🧳 Fits under-seat on most airlines 🎒 Great for: moms, work trips, personal items, weekend getaways ✈️ Travel must-have that actually makes packing easier. 🔍 Keywords to include (in tags + within caption): BagSmart duffel under seat bag carry on bag personal item bag travel duffel flight approved bag best travel bag for moms weekend bag airport personal item medium vs large duffel comparison mom travel essentials Amazon travel bags LTKTravel LTKItBag LTKFindsUnder50