Storage fees vary by station, €2–6 per locker per day. There are different size lockers but most stations have larger lockers permitting storage of large suitcases in addition to smaller lockers.
Check from the station services information page whether your departure or arrival station has luggage lockers and station-specific storage fees. Please note that the lockers are located within the station and are accessible during station opening hours.
Check whether your departure or arrival station has luggage lockers from the station information page.