Plugin WPML: How to use your own country flags?

1. The new flag images are uploaded under WPML >> languages >> edit languages.
2. If you want to change the default size of the flags, you have to upload them under wp-content/uploads/flags as well.
3. Customize CSS code

.wpml-ls-menu-item .wpml-ls-flag {
  height: auto !important;
  width: auto !important;
}