Scrollbar size is not included in the grid container's height and it should be. Example to reproduce the issue: <div style="display: -webkit-grid; overflow: scroll;"> <div style="background: lime;">item</div> </div> The grid's height should be the item's height + the scrollbar. Note that this is working properly for the width. This was already reported and fixed in Blink: https://code.google.com/p/chromium/issues/detail?id=532032