Checked bags that can weigh up to 23kg usually have dimensions of 50 x 80 x 28cm (length x width x height), known as the medium (M) size of a travel suitcase. Therefore, look for a good quality model that fits these measurements. The material of the suitcase can be flexible, semi-rigid, or rigid.

A 23 kg suitcase (the standard weight limit for most international checked bags) typically looks like a "medium-to-large" checked suitcase, usually measuring between 24 and 27 inches (61–68 cm) in height. Visually, it is significantly larger than a carry-on but not as massive as the "extra-large" trunks used for long-term moving. A 23 kg load usually fills a medium case to its brim if you are packing standard clothing, shoes, and toiletries. However, if you are using a large 28-to-30-inch suitcase, you must be very careful; a large case is very easy to overpack, and if filled completely with heavy items like books or boots, it will easily exceed 30 kg. For 2026 travel, many airlines are becoming stricter with dimensions as well as weight, so a case with "linear dimensions" (length + width + height) of roughly 158 cm (62 inches) is the safe industry standard. If your bag looks like it reaches mid-thigh height on an average person and requires two hands for most people to lift comfortably, it is likely in the 20-25 kg range.