.input-prepend.input-append input {
  font-size: 24px;
  padding-top: 11px;
  padding-bottom: 11px;
  width: 50px;
  text-align: right;
}
.stock_error {
  color: #DB5656;
}
@media only screen and (max-width: 786px){
  	.input-prepend.input-append input{
		font-size:18px;
		width:35px;
		padding-top:5px;
		padding-bottom:7px;
	}
}