What are the standard dimensions of a suitcase?

Standard suitcase dimensions can vary depending on the type and purpose, but common sizes include carry-on luggage (approximately 22 x 14 x 9 inches or 56 x 36 x 23 cm) and checked luggage (typically around 27 x 21 x 14 inches or 69 x 53 x 36 cm). Airlines may have specific size restrictions, especially for carry-ons, so it's essential to check with your airline before traveling. Additionally, suitcases often come in various sizes, such as small, medium, and large, to accommodate different travel needs.