The Bigger Carry-On Flex (Jet Black) | Away

What the official page says

Exterior measurements 23" x 15.4" x 9.4" Interior measurements 21" x 14.5" Weight 8.6 lbs Capacity 49 L Capacity when expanded 56 L Note: Depending on the size of the plane, you may need to check this bag on your flight when fully expanded. Measurements include handles and wheels.