How do girls check out boys?

Answer 1

teen girls tend to look at them and if they are with friends, will be like 'ooh girl he is cute' some might even smile at you

Answer 2

Girls may check out boys by making eye contact, smiling, flipping or playing with their hair, laughing at their jokes, or finding excuses to be near them. They may also observe body language, sense if the boy is nervous or interested, and assess overall attractiveness.

Answer 3

they look at you.

but not like a 'hey' look. more like a 'heeey' look.

they check if your shoes match you're eyes

and it probably last more than 5 seconds.