<form action="select.html" method="post">
            <select name="testvalue1">
                <option>Sample value #1</option>
                <option>Sample value #2</option>
                <option>Sample value #3</option>
                <option>Sample value #4</option>
                <option>Sample value #5</option>
                <option>Sample value #6</option>
                <option>Sample value #7</option>
                <option>Sample value #8</option>
                <option>Sample value #9</option>
            </select>
        </form>
    
                   

                     
        <form action="select.html" method="post">
            <select name="testvalue2" size="3">
                <option>Sample value #1</option>
                <option>Sample value #2</option>
                <option>Sample value #3</option>
            </select>
        </form>
    
                   

                     
        <form action="select.html" method="post">
            <select name="testvalue3" size="3">
                <option>Sample value #1</option>
                <option>Sample value #2</option>
                <option>Sample value #3</option>
                <option>Sample value #4</option>
                <option>Sample value #5</option>
                <option>Sample value #6</option>
                <option>Sample value #7</option>
                <option>Sample value #8</option>
                <option>Sample value #9</option>
            </select>
        </form>
    
                   

                     
        <form action="select.html" method="post">
            <select name="testvalue3" size="3" style="width: 100%">
                <option>Sample value #1</option>
                <option>Sample value #2</option>
                <option>Sample value #3</option>
                <option>Sample value #4</option>
                <option>Sample value #5</option>
                <option>Sample value #6</option>
                <option>Sample value #7</option>
                <option>Sample value #8</option>
                <option>Sample value #9</option>
            </select>
        </form>