Trying to make bootstrap modal wider

I am using this code but the modal is too thin:

<div class="modal fade bs-example-modal-lg custom-modal" tabindex="-1" role="dialog" aria-labelledby="myModal" aria-hidden="true" id="myModal">
	<div class="modal-dialog modal-lg">
		<div class="modal-content modal-lg">
			<div class="modal-header modal-lg">
				<button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
				<h4 class="modal-title">Solutions</h4>
			</div>
			<div class="modal-body modal-lg">
				<p>Content</p>
			</div>
		</div>
	</div>
</div>

This is what it looks like:

How can I make that modal much wider? Ideally I'd like it to be around double that width as it is too skinny at the moment.

Always have handy the un-minified CSS for bootstrap so you can see what styles they have on their components, then create a CSS file AFTER it, if you don't use LESS and over-write their mixins or whatever

This is the default modal css for 768px and up:

@media (min-width: 768px) {
  .modal-dialog {
    width: 600px;
    margin: 30px auto;
  }
  ...
}

They have a class modal-lg for larger widths

@media (min-width: 992px) {
  .modal-lg {
    width: 900px;
  }
}

If you need something twice the 600px size, and something fluid, do something like this in your CSS after the Bootstrap css and assign that class to the modal-dialog.

@media (min-width: 768px) {
  .modal-xl {
    width: 90%;
   max-width:1200px;
  }
}

HTML

<div class="modal-dialog modal-xl">

Demo: http://jsbin.com/yefas/1

If you need this solution for only few types of modals just use style="width:90%" attribute.

example:

div class="modal-dialog modal-lg" style="width:90%"

note: this will change only this particular modal

You could try:

.modal.modal-wide .modal-dialog {
  width: 90%;
}

.modal-wide .modal-body {
  overflow-y: auto;
}

Just add .modal-wide to your classes

To follow up on Kryszof Ra's answer, try "min-width" instead of "width":

<div class="modal-dialog modal-lg" style="min-width:90%">

Verified working with bootstrap 5.

For Bootstrap 5.1 (Nov 2021) the earlier answers did not work. You can have different sizes like this:

<div class="modal-dialog modal-xl">...</div>
<div class="modal-dialog modal-lg">...</div>
<div class="modal-dialog modal-sm">...</div>
<div class="modal-dialog modal">...</div>

If this does not suffice, you also can customise it in a relatively easy way:

Make a file in which you collect all your bootstrap custom styles, e.g. bootstrap-customisation.scss

$modal-md: 600px;
@import '../../node_modules/bootstrap/scss/bootstrap.scss';

This overwrites the default size of the normal modal from 500px to 600px. For more information visit https://getbootstrap.com/docs/5.0/components/modal/#variables

In your styles.scss

@import "bootstrap-customisation";