Yes, you can bring a suitcase on almost any train in the world in 2026, but you are generally subject to size and weight "guidelines" rather than strict airline-style penalties. Most major networks (like Amtrak, DB in Germany, or the AVE in Spain) allow two large suitcases plus one personal item per passenger. The general rule is that you must be able to lift, carry, and store your own luggage in the designated racks or overhead compartments without staff assistance. In some countries, like India, official rules state that suitcases should not exceed 100cm x 60cm x 25cm; if they do, they technically must be booked in the "brake van" for a small fee. For 2026 travelers on high-speed trains like Eurostar or Lumo, there are increasingly strict "per-bag" limits to manage cabin congestion. While "excess" luggage is rarely weighed, if your bag blocks the aisles or takes up extra seats, you may be asked to pay an additional fee or move the item to a specialized luggage area.