How to get equal width of input and select fields

Question

On the form, I have one select and two input fields. These elements are vertically aligned. Unfortunately, I can\'t get equal width of these elements.

Here\'s my co

Answer 1

I tried Gaby's answer (+1) above but it only partially solved my problem. Instead I used the following CSS, where content-box was changed to border-box:

input, select {
    -webkit-box-sizing: border-box;
       -moz-box-sizing: border-box;
            box-sizing: border-box;
}