/* assume intended width is 550px with 15px image gap on either side and 25px in-image padding*/
.measure { width: 550px; background: #0000FF; margin: 20px auto 0; } /* max image width inc outside gap = measure2 + outside gap */
.measure2 { width: 520px; background: #FF0000; margin: 0 auto 0; }    /* Interior Image = max interior width excluding drop shadows/glows */
.measure3 { width: 470px; background: #00FF00; margin: 0 auto 0; }  /* Interior padding = max interior width */
.measure, .measure2, .measure3 {
    text-align: center;
    padding: 1px 0 2px;
    color: #fff;
}