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by configuring it in styeable 

    <style name="myDialog" parent="Theme.AppCompat.Dialog">
        <item name="android:windowNoTitle">true</item>
    </style>
    
    <style name="Theme.Holo.Dialog.NoActionBar.MinWidth">
    <item name="android:windowMinWidthMajor">@android:dimen/dialog_min_width_major</item>
    <item name="android:windowMinWidthMinor">@android:dimen/dialog_min_width_minor</item>
</style>

<style name="CustomDialog" parent="@android:style/Theme.Dialog">
    <item name="android:windowIsTranslucent">true</item>
    <item name="android:windowBackground">@color/Black0Percent</item>
    <item name="android:paddingTop">20dp</item>
    <item name="android:windowContentOverlay">@null</item>
    <item name="android:windowNoTitle">true</item>
    <item name="android:backgroundDimEnabled">false</item>
    <item name="android:windowIsFloating">false</item>
</style>

// another way is by only using Dialog we can implement
  private void showOTPDialog() {

        final Dialog dialogOtp = new Dialog(this, R.style.myDialog);
        dialogOtp.setContentView(R.layout.otp_field);
        dialogOtp.setCancelable(true);

      PinEntryEditText pinEntryEditText = dialogOtp.findViewById(R.id.txt_pin_entry);
       Button buttonVerify = dialogOtp.findViewById(R.id.verifybtn);

       buttonVerify.setOnClickListener(new View.OnClickListener() {
           @Override
           public void onClick(View view) {
               dialogOtp.dismiss();
           }
       });

        //now that the dialog is set up, it's time to show
        try {
            dialogOtp.show();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

public class OtpDialog extends DialogFragment {

    private PinEntryEditText pinEntryEditText;
    private Button buttonVerify;

    @Nullable
    @Override
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.otp_field, null);

        getDialog().getWindow().requestFeature(Window.FEATURE_NO_TITLE);
        /*frag.setStyle(DialogFragment.STYLE_NO_TITLE, R.style.Dialog_NoTitle);*/

            int width = getResources().getDimensionPixelSize(R.dimen.otp_dialog_width);
            int height = getResources().getDimensionPixelSize(R.dimen.otp_dialog_height);
            getDialog().getWindow().setLayout(width, height);

        pinEntryEditText = view.findViewById(R.id.txt_pin_entry);
        buttonVerify = view.findViewById(R.id.verifybtn);
        return view;
    }


// add this on onStart 
    @Override
    public void onStart() {
        super.onStart();
        getDialog().getWindow().setLayout(ViewGroup.LayoutParams.MATCH_PARENT, (int) getResources().getDimension(R.dimen.dialog_height));
    }
}

 new OtpDialog().show(getFragmentManager(),null);