It is common for people's feet to get slightly bigger as the day goes on due to the fact that our feet swell when we are standing up or walking a lot. For this reason, you should always shop for shoes in the afternoon or after you finish work. A pair of shoes that fit you in the morning will likely be too tight later on in the day, so it's better to shop when your feet are at their biggest.

It is also common for people's feet to grow slightly as they age, even in adulthood, so it's important to get your feet measured when buying a new pair of shoes or if the shoes you normally wear feel too tight.