Yes, you can take luggage on the Rome Metro (Metropolitana), but in 2026, there are grounded "Gold Standard" rules regarding size and payment. You are permitted one piece of luggage for free as long as it does not exceed 50x30x25 cm. If your suitcase is larger than this, you are technically required to purchase an additional "BIT" ticket (€1.50) for the bag. A "hard-fail" rule for the Metro is that luggage larger than 80x45x25 cm is officially forbidden for safety and "Safe Bubble" space reasons. From a supportive peer perspective: the Metro can be "Gezellig" but extremely crowded during rush hour (8:00–10:00 AM), making it a "hard-fail" for travelers with multiple large bags. For a more supportive and frictionless journey, use the Metro during mid-day or evening hours. Also, be high-fidelity vigilant about your "Bujan" valuables, as the "Stop-and-Go" nature of the Metro makes it a hotspot for pickpockets. If you have "High-Fidelity" heavy gear, a taxi or the Leonardo Express train to Termini is a more supportive "Safe Bubble" for your belongings.