23" - 24" Small Checked Luggage These sizes are popular for travelers looking for a smaller, lighter option of luggage to check. These pieces are too large to carry onto the plane, but are perfect for trips of 3 to 5 days. There is room for 2 to 3 outfits, a couple pair of shoes, and toiletry kits.

For a 4-day trip, a standard carry-on suitcase (approx. 35 to 45 liters) is the ideal size. Most major airlines allow carry-ons with dimensions around 22 x 14 x 9 inches (56 x 36 x 23 cm), which is more than enough space for four days of clothing, a pair of extra shoes, and your toiletries. If you use "packing cubes" or the rolling method, you can easily fit 4 shirts, 2 pairs of trousers, undergarments, and a lightweight jacket while still leaving room for small souvenirs. Choosing a carry-on instead of a large checked bag saves you time at the airport by skipping the baggage carousel and avoids potential checked-bag fees. If you are a particularly light packer or traveling to a warm climate, you might even manage with a large "personal item" backpack (approx. 25-30 liters). Only consider a medium checked bag (60+ liters) if you are traveling for a formal event like a wedding that requires multiple bulky outfits or if you are carrying heavy specialized equipment like a professional camera setup or sports gear.