Girls, hello! Can you tell me how to choose compression stockings? I d…

Girls, hello! Can you tell me how to choose compression stockings? I don't have any indication for varicose veins and pregnancy, but in the hospital they say you need to take them anyway. What kind should I get, 1st or 2nd class? I found an article online that says 2nd class is for those with varicose veins, can you tell me how you chose yours and what happened in the end - ER or KS?