You assume the form of a creature of the same type as your normal form (such as humanoid or magical beast).  You can seem 1 foot shorter or taller, thin, fat, or in between. You cannot change your body type. Otherwise, the extent of the apparent change is up to you.  You can freely designate the new form's minor physical qualities (such as hair color, hair texture, and skin color) within the normal ranges for a creature of that kind. The new form's significant physical qualities (such as height, weight, and gender) are also under your control, but they must fall within the norms for the new form's kind. You are effectively disguised as an average member of the new form's race. If you use this spell to create a disguise, you get a +10 bonus on your Deception check.

The spell does not provide the abilities or mannerisms of the chosen form. 

When the change occurs, your equipment, if any, either remains worn or held by the new form (if it is capable of wearing or holding the item), or melds into the new form and becomes nonfunctional. When you revert to your true form, any objects previously melded into the new form reappear in the same location on your body they previously occupied and are once again functional. Any new items you wore in the assumed form and can't wear in your normal form fall off and land at your feet; any that you could wear in either form or carry in a body part common to both forms (mouth, hands, or the like) at the time of reversion are still held in the same way. Any part of the body or piece of equipment that is separated from the whole reverts to its true form.