Answers for "bootstrap 3 input text boxes"

large input box bootstrap 4

.form-control-sm
.form-control-lg

bootstrap input tagsinput

<select multiple data-role="tagsinput">
  <option value="Amsterdam">Amsterdam</option>
  <option value="Washington">Washington</option>
  <option value="Sydney">Sydney</option>
  <option value="Beijing">Beijing</option>
  <option value="Cairo">Cairo</option>
</select>