If you cannot decide what to wear for your passport photo keep in mind the passport photo will only show your head and shoulders. It doesn’t matter what you wear below the waist, but the area around your neck will be visible in the photo.
Don’t wear glasses
Your photo could be rejected and your application put on hold if you submit a photo with glasses. Especially if your glasses have a glare on the lenses.
Don’t wear anything on your head
No hats, headbands, or scarves. If you wear religious headgear on a daily basis, you are allowed to wear it in your passport photo as long as your face is clearly visible. You’ll need to also submit a letter explaining your religious headgear.
Don’t wear a uniform of any sort
The Passport Agency will reject photos that show you in uniform.