Although any sized bag can hold 30 kilos, depending on the density of what's inside it. In general, what you are looking for is a bag that is 72 cm high to hold 30 kilos of clothes and toiletries.
A full suitcase typically weighs between 30 and 50 pounds. The weight of a suitcase depends on its size and the type of items packed inside. For example, a small carry-on bag might weigh 20 pounds when empty but could easily reach 30 or 40 pounds when full.
50-75 liters: For a trip that lasts one to two weeks, many people jump up to a bag in this range. 75 liters-100+ liters: For big expeditions, travelers typically need several large bags that can hold 75 liters or more each.
In your example you have a 30kg limit, which would allow you to check a single bag weighing 30kg, OR one bag weighting 10kg and another weighing 20kg, OR three bags weighting 10kg each. With a weight model, excess baggage charges generally only apply if your total weight is over the allowed weight.
The 30k generally means that you are allowed to check in up to 30 kilograms of luggage (sometimes it can be measured in pounds) on the flight, depending on the fare class and route. This weight limit applies to both checked baggage and any carry-on baggage you may bring with you.
Although there are various shapes and sizes, most 23 kg suitcases have large and extra large suitcase dimensions and are appropriate for checked-in travel on airlines. Typically, a 23kg suitcase size will have the following measurements: Length: 71-81 cm (28-32 inches )
Most bags that fit under 20kg suitcase category are large or XXL suitcases that are suitable for checked in travel on airlines. In general a 20kg suitcase has the following dimensions: Length: 69-81 cm (27-32 inches) Width: 43-51 cm (17-20 inches )
Measuring the size of your luggage isn't tricky. Most airlines require that your bag be 62 linear inches or less. Therefore, your bag's length, width and height cannot exceed 62 inches. This measurement includes the wheels and the handle of your luggage.
Large suitcases: 2 to 3-week tripLarge suitcases have a height of around 75cm. These suitcases are ideal for a 2 to 3-week trip, like to the French Riviera. The suitcases have a capacity of about 75 to 91L, which equals to about 15 to 20kg of luggage.
You are allowed to bring a quart-sized bag of liquids, aerosols, gels, creams and pastes through the checkpoint.These are limited to 3.4 ounces (100 milliliters) or less per item. This is also known as the 3-1-1 liquids rule.