Mattresses in student dormitories can be bought in many places, including furniture stores and online shopping platforms. The furniture store has a special mattress area, so you can choose the right mattress yourself. Many online shopping platforms also offer mattresses of various types and sizes. You can browse and compare different options online. When purchasing a mattress, it is recommended to comprehensively consider the size, material, hardness, price and other factors of the mattress to ensure that the mattress suitable for the demand and budget is selected.