There are all kinds of ways that you can dress your baby. You can, for example, simply put them in babygros or you can dress up them up in mini outfits. The best recommendation you can get when you are shopping for baby clothes is not to buy too many. Babies grow incredibly fast and can sometimes even outgrow their clothes before they've had a chance to wear them!
New parents shouldn't worry too much about buying baby clothes. After all, you won't really know what size your newborn baby will be until you give birth. For this reason many parents will buy enough clothes to get through a week or so in a variety of sizes (they'll usually err on the larger side) and will then buy more clothes once the baby is born. And, of course you will probably find that many people will give you clothes as a present when the baby is born.
You will still, however, need multiple outfits/clothes for your baby. Most babies will generally not last the whole day in one outfit so you will need enough clothes to change them into on a daily basis. Many parents will make sure that they have a stock of babygros to help them out here. These all in one suits can be worn in bed or during the day and are an easy way to dress a baby quickly and simply without any fuss.
Not all baby clothes will be sized in the same way. Like adult clothes, shops and manufacturers will have their own way of sizing here so it is important to think about size before you buy any baby clothes. So, here, for example, clothes may be sized by the weight of a baby or by their age. It is also important to buy clothes for the right time of year. There is no point dressing your baby in summer clothes in the winter or winter clothes in the summer as they will be uncomfortable and could get ill.