Is it possible to customize style of bootstrap $modal

In my application I am using bootstrap $modal popup two different times. content of both pop-ups is different hence size of both pop-up must be also different. I tried to style $modal using

.modal {
    display: block;
    position: absolute;
    left: 60%;
    height: 88%;
    width: 28%;
    overflow-y:auto;
    overflow-x:auto;
    border-radius: 0px;
}

but as expected it is changing style of both of my pop-ups. Is there any way to apply different class to each popup?

Thanks in advance.