Hi mummies do u buy breastpump after u deliver or before? What breastpump is suitable for small breasts?

i got my manual breast pump before i delivered. I am fortunate that my friends and sisters lend me their electric breast pumps. Hence, I only used my manual bp when I go out as it is easier. Size doesnt matter as it has many different sizes of the shield. There are many shops that allow you to try before buying. You can also use the hosp pumps after you delivered.