html - Bootstrap Grid - Square Tiles with same horizontal/vertical gap

Question

I'm trying to create a Grid of Tiles with Bootstrap with the following properties:

• all tiles should be squares
• horizontal and vertical gaps should be the same (even the same compared on different screen-widths)
• the tiles should always be centered in the middle of the screen(distance from the left edge of website to the left border of the leftmost tile = distance from the right edge of the website to the right border of the righmost tile)

It should look like this:

body{
   background: #a5b5c5;
   background:lightblue !important;
    }

    .box{
   height: 180px;
   width: 180px;
   background: #fff;
   border-radius: 4px;
    }

    .col-lg-2, .col-md-3, .col-xs-6{
     margin-top: 12px !important;
    }

<div class="container">
<div class="row">

<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
<div class="col-lg-2 col-md-3 col-xs-6 ">
<div class="box"></div>
</div>
  </div>
</div>

Answer 1

You didn't mention specific box dimensions, only that they should remain square. In that case, use margin-top:30px to corresponding with the Bootstrap gutter width, and padding-bottom: 100%; on the box.

.box {
   background: #fff;
   border-radius: 4px;
   padding-bottom: 100%;
}

.col-lg-2, .col-md-3, .col-xs-6{
    margin-top: 30px !important;
}

Bootstrap 3 demo
Bootstrap 4 demo

Note: Setting a px size on the .box (ie:width:180px;height:180px) will prevent the boxes from resizing responsively.

---

You can increase the gutter by changing margins and padding. Margin is double the padding for example...

.col-lg-2, .col-md-3, .col-xs-6{
    padding-left: 30px;
    padding-right: 30px;
    margin-top: 60px;
}