Doesn't support different image size ?

[Zhou Hao]

I have a layout before using ihover:

But when I use ihover it becomes:

My html:

        <div class="carousel slide media-carousel-sm visible-sm media-sm" id="section-media-sm">
                <div class="carousel-inner">
                    <div class="item active">
                        <div class="row">
                            <div class="col-xs-6 withborder">

                                <div class="ih-item square colored effect13 bottom_to_top">
                                    <a href="#">
                                        <div class="img"><img src="http://placehold.it/331x260" alt="img"></div>
                                        <div class="info">
                                            <h3>Heading here</h3>
                                            <p>Description goes here</p>
                                        </div>
                                    </a>
                                </div>
                                <!--<a class="thumbnail" href="#">-->
                                    <!--<img alt="" src="http://placehold.it/331x260">-->
                                <!--</a>-->
                            </div>
                            <div class="col-xs-6">
                                <div class="row">
                                    <div class="col-xs-6">

                                        <div class="ih-item square colored effect13 bottom_to_top">
                                            <a href="#">
                                                <div class="img"><img src="http://placehold.it/220x124" alt="img"></div>
                                                <div class="info">
                                                    <h3>Heading here</h3>
                                                    <p>Description goes here</p>
                                                </div>
                                            </a>
                                        </div>
                                        <!--<a class="thumbnail" href="#">-->
                                            <!--<img alt="" src="http://placehold.it/220x124">-->
                                        <!--</a>-->
                                    </div>
                                    <div class="col-xs-6">
                                        <div class="ih-item square colored effect13 bottom_to_top">
                                            <a href="#">
                                                <div class="img"><img src="http://placehold.it/220x124" alt="img"></div>
                                                <div class="info">
                                                    <h3>Heading here</h3>
                                                    <p>Description goes here</p>
                                                </div>
                                            </a>
                                        </div>
                                        <!-- -->
                                        <!--<a class="thumbnail" href="#">-->
                                            <!--<img alt="" src="http://placehold.it/220x124">-->
                                        <!--</a>-->
                                    </div>
                                    <div class="col-xs-6">
                                        <div class="ih-item square colored effect13 bottom_to_top">
                                            <a href="#">
                                                <div class="img"><img src="http://placehold.it/220x124" alt="img"></div>
                                                <div class="info">
                                                    <h3>Heading here</h3>
                                                    <p>Description goes here</p>
                                                </div>
                                            </a>
                                        </div>
                                        <!--<a class="thumbnail" href="#">-->
                                            <!--<img alt="" src="http://placehold.it/220x124">-->
                                        <!--</a>-->
                                    </div>
                                    <div class="col-xs-6">
                                        <div class="ih-item square colored effect13 bottom_to_top">
                                            <a href="#">
                                                <div class="img"><img src="http://placehold.it/220x124" alt="img"></div>
                                                <div class="info">
                                                    <h3>Heading here</h3>
                                                    <p>Description goes here</p>
                                                </div>
                                            </a>
                                        </div>
                                        <!--<a class="thumbnail" href="#">-->
                                            <!--<img alt="" src="http://placehold.it/220x124">-->
                                        <!--</a>-->
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>

The code inside is what I used before ihover. Here is the css:

    $carousel-top: 50px;
$carousel-control-offset: -2px;

body
{
  padding-top: $carousel-top;
  background-color: #dfdfdf;
}

.media-up .thumbnail,
.media-sm .thumbnail,
.media-xs .thumbnail {
  margin-bottom: 18px;
}
.media-carousel-xs,
.media-carousel-sm,
.media-carousel-up {
  margin-bottom: 0px;
  padding: 15px;
  border: 0px solid #e5e5e5;
}
.thumbnail {
  img {
    width: 100%;
    position: relative;
  }
}

My question is if ihover support different size images? Thanks.