Posture If you're slumped over all the time and looking down, it comes off to people as if you have a low self esteem and you're afraid of what people think of you. Good posture is key to show you have a postive self esteem. Keep your chin up and your back straight.
Facial Expressions To show a high self-esteem, you usually will want to smile and laugh. If you have a frown on your face people will think you're uncomfortable and have a low self-esteem.
The Way you Talk to Others If you constantly talk about negative things that show your insecurities or say sorry a lot, people will know that you have a low self-esteem. When you talk about positive things and make others happy by your happiness, people will think you have a high self esteem.
Quality ofHand Shake A good handshake will show confidence, which shows high self-esteem. A weak handshake shows insecurity, which shows a low self-esteem.
Appearence If you always hide yourself behind large clothes and dont strut like a model on the runway, it shows a lack of self-esteem. If you dress nice and keep groomed, it shows high self esteem and that you care about your appearence to a healthy extent.
Actions If you constantly talk bad about others it shows you have a low self-esteem. When you bring others up it shows your comfortable with yourself and have a high self-esteem.