How to make an image center (vertically & horizontally) inside a bigger div [duplicate]

Answer 1

I've found that Valamas' and Lepu's answers above are the most straightforward answers that deal with images of unknown size, or of known size that you'd rather not hard-code into your CSS. I just have a few small tweaks: remove irrelevant styles, size it to 200px to match the question, and add max-height/max-width to handle images that may be too large.

div.image-thumbnail
{
    width: 200px;
    height: 200px;
    line-height: 200px;
    text-align: center;
}
div.image-thumbnail img
{
    vertical-align: middle;
    max-height: 200px;
    max-width: 200px;
}