Exibir bloco embutido não está funcionando
.ex, .ex2, .ex3 {
display: inline-block;
vertical-align: top;
margin: 0;
padding: 0;
height: 100%; /* no need of height: 200px; here */
} /* if you need to extend it to parent height */
/* then use height: 100% */
Disturbed Dolphin