<style>
.block {
width: 100%;
}

.avatar {
width: 120px;
height: 120px;
background: #ccc;
float: left;
margin-right: 10px;
}

.text {
border: 1px #000 solid;
}
</style>
<div class="block">
<div class="avatar"></div>
<div class="text">Текст..........................<br />Текст..........................<br />Текст..........................</div>
<div style="clear: both;"></div>
</div>

5 минут.