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#meio {
width: 100%;
text-align: center;
}
.box {
margin: 10px 4px;
margin-bottom: -4px;
display: inline-block;
}
#box-1 {
width: 290px;
height: 300px;
background-color: white;
}
#box-2 {
width: 290px;
height: 300px;
background-color: white;
}
#box-3 {
width: 290px;
height: 300px;
background-color: white;
}
<div id="meio">
<div id="box-1" class="box">aaaaa</div>
<div id="box-2" class="box"></div>
<div id="box-3" class="box"></div>
</div>