A clamp has been sewn in at the back, which can be used to mount the bag on a suitcase. This will make it easy to move around with both a suitcase and a bag. Keep calm and don't worry about possible costs for imprecise size of hand luggage.
Cabin Bags 40x20x25 for Ryanair UnderSeat 20L Small Travel Hand
CarryOn Cabin Bag Backpack 40x25x20 Aircraft Hand Luggage Leaves
CarryOn Cabin Bag Backpack 40x25x20 Aircraft Hand Luggage
5 Cities Ryanair Max (40x20x25cm) New and Improved 2024 Backpack
BAGAGE À MAIN sacs à dos sacs chariot cabine à roues Ryanair
Cabinmax lightweight cabin bags with wheels and handles ideal for
CarryOn Cabin Bag Backpack 40x25x20 Aircraft Hand Luggage Leaves
CarryOn Cabin Bag Backpack 40x25x20 Aircraft Hand Luggage Leaves
Carry-On Cabin Bag Backpack 40x25x20 Aircraft Hand Luggage Grey