It comes in two sizes: one sized for a personal item, and one for a carry-on.
Promising review: “BUY NOW! BEST TRAVEL BAG! BEIS [swap]! This bag is great! Literally don’t hesitate on buying it!! I have traveled on Frontier, Spirit, Jet Blue, all no problem fit inside the bag measuring size perfectly! BEST PART I traveled a lot this summer, to Mexico, Nicaragua, and Jamaica, all for 5-6 days, all my stuff fit in perfectly!! I had three JEANS, two SHORTS, seven TOP, five bathing suits, two sandals, one pair of flip-flops and three makeup bags, plus a charger on the side pockets! If you want to travel on a budget this bag is your best friend. Plus the bag is super sturdy and great material with strong zippers.” —Franyeska Pravia
Promising review: “So much room for packing with this little weekender bag. The shoe compartment is great for packing towels and shoes if you want. It fits perfectly under the airplane seat. All these little compartments to have your phone, keys, headphones, wallet are very convenient. So many different colors to choose from which is also nice. I’ve convinced my mom to get one and all my friends because it is a [swap] for the Beis weekender but less than half the cost.” —Hfr123
Get it from Amazon for $30.58+ (available in two sizes and 38 colors).