Background image and providing padding to it

I have a select input and i want to put small image icon at the right of it with some padding on it. For this the easy solution is

My input

 <select placeholder="Filter By" class="searchuser userddl">
                    <option>Filter By</option>
                    <option>Recently Updated</option>
                    <option>Recently Deleted</option>

And the css to give background image along with some padding is:

select.searchuser.userddl {
    background: #000 url('/images/down-arrow.png');
    background-position: right 7px top 6px;
    background-repeat: no-repeat;

And the output appears as