You can change the appearance of your upper half or lower body to appear as and other creature you have seen of the same size.,use polymorph self rules
Once per day for a duration of 1 hour you make take the form of any other humanoid of medium size you have seen. You need to spend 1 full minute concentrating on the form you would like to take and make a successful charisma check DC10 to make the change. A failed roll results in no change and the attempt for that day is used up. ,