Set height width for markdown forms widget

I am using this in my forms, but the editor width is too much that is going outside the region, i have applied all width control attributes to div , but the widget is always going outside the region. Is there any way to set max-width of markdown editor in forms.?
##

---
Want to back this issue? **[Post a bounty on it!](https://www.bountysource.com/issues/8245074-set-height-width-for-markdown-forms-widget?utm_campaign=plugin&utm_content=tracker%2F332251&utm_medium=issues&utm_source=github)** We accept bounties via [Bountysource](https://www.bountysource.com/?utm_campaign=plugin&utm_content=tracker%2F332251&utm_medium=issues&utm_source=github).

Start by reproducing the markdown editor inside a Django form and inspect the widget's rendered markup and styling. The change is complete when its width can be constrained to the surrounding region and its height or width can be set as requested, with the existing form behavior preserved.

Written by the indexing model from the issue text.