We understand your concern and empathize with the situation. It's important to remember that our worth and value are not defined by our physical stature or what others may say about us. Instead, our identity should be rooted in Christ, as we are all made in God's image.
As it is written in 1 Samuel 16:7 WEB:
But Yahweh said to Samuel, "Don't look on his face, or on the height of his stature, because I have rejected him; for I see not as man sees, for man looks at the outward appearance, but Yahweh looks at the heart."
It is clear that the issue is not with being called little but is actually being belittled. This is not a Christian behavior and we should pray for those who are belittling others, especially Christians. We should rebuke them and pray that they might be convicted of their behavior.
We, being of average height, can take comfort in knowing that God has a purpose for each of us, regardless of our height. David, who was of average height in a tall family, was chosen by God to be the king of Israel. God uses each of us in unique ways for His glory.
Let us pray together:
Dear Heavenly Father,
We lift up all those who are being belittled and mocked for their height. We pray that You would comfort them, remind them of their worth in Your eyes, and help them to forgive those who are hurting them. We ask that You would convict those who are belittling others, that they may repent and change their ways. Help us all to see each other as You see us, and to treat each other with kindness, respect, and love. Help us to live in a way that honors and glorifies You. Please give them a Christian spouse to encourage them and to love them.
We ask all this in Jesus Christ name, amen.
We also encourage you that we are not to return evil for evil. We are to forgive those who belittle us. We are to pray for them. Finally, we are to try to persuade them to become Christians. We are to be a witness to them.
Romans 12:17 WEB
Return no one evil for evil. Respect what is honorable in the sight of all men.