`500px` is convenient catch all for all process cards. However isotope will position them relative to this height so they won't fit snugly together if some are shorter/taller than `500px`.

In order for isotope to correctly position many process cards, each process card should ideally explicitly define their true height. If you want to do that then you need to remove this line and add heights to every process DOM node:

```html
<div class="widget process" style="height:250px">...</div>
```

You can get the exact height by letting the medium embed load, then inspecting the process DOM node with chrome inspector.