View source for Game Help:Changing Sims' Appearance

==How do I change my sims' clothing?==
Sims only come with the clothing you put them in when you created them in Create a Family. You will need to have them purchase more clothes before they can change outfits.  

One adult sim can buy clothes for the whole family.

To purchase more clothing, have a sim drive to a community lot (via an owned vehicle or taxi) that contains a clothing rack. If you are playing a built-in neighborhood there are generally several community lots with clothing store functions.

* Click on the clothing rack and choose your outfits. You can browse, try on, and purchase. Purchase the clothing of your choice. Remember, if you get separate everyday clothing you will need to make sure to purchase at least one top and one bottom in order for that clothing to work.

* When you have finished purchasing clothing, have your sim return home.

* Your sim will need to own a wardrobe or dresser to change their clothes. Click on the wardrobe or dresser and choose Plan Outfit. Choose the clothing you would like your sim to wear for that type. If you would like them to change into that outfit, click on Change Into... and choose the clothing type you would like.