50l air travel backpack on airplane LOVEVOOK Large for Women & Men, Carry Backpack Airline Approved, Waterproof Travel Essentials fits 18" Laptop, TSA Personal Item Travels Bag Sports Backpack with 3 Packing Cubes Serum Color:Spiced Chai / Atlantic Teal Osprey Sportlite 25L Lightweight

50l air travel backpack on airplane LOVEVOOK Large for Women & Men, Carry Backpack Airline Approved, Waterproof Travel Essentials fits 18" Laptop, TSA Personal Item Travels Bag Sports Backpack with 3 Packing Cubes Serum Color:Spiced Chai / Atlantic Teal Osprey Sportlite 25L Lightweight

Osprey Sportlite 25L Lightweight Hiking Backpack for Men and Women, Aubergine Purple, S/M

Balances lightweight comfort with enduring toughness—ideal for classrooms and commutes

Serum

Color:Spiced Chai / Atlantic Teal

I went with the small version, even though from pictures and looking at the dimensions on the Timbuk2 site, I still was not totally confident of its size (hopefully this review helps illustrate how large or small it is)