Note: Our system is based on the Bootstrap toolkit. The contents of this page are a simplified version of Bootstrap's extensive documentation.

Source: Read more about this topic on Bootstrap's website.


Our grid system uses a series of containers, rows, and columns to layout and align content. It's built with flexbox and is fully responsive.

How it Works
  • Our grid supports six responsive breakpoints. Breakpoints are based on min-width media queries, meaning they affect that breakpoint and all those above it (e.g., .col-sm-4 applies to sm, md, lg, xl, and xxl). This means you can control container and column sizing and behavior by each breakpoint.
  • Containers center and horizontally pad your content. Use .container for a responsive pixel width, .container-fluid for width:100% across all viewports and devices, or a responsive container (e.g., .container-md) for a combination of fluid and pixel widths.
  • Rows are wrappers for columns. Each column has horizontal padding (called a gutter) for controlling the space between them. This padding is then counteracted on the rows with negative margins to ensure the content in your columns is visually aligned down the left side. Rows also support modifier classes to uniformly apply column sizing and gutter classes to change the spacing of your content.
  • Columns are incredibly flexible. There are 12 template columns available per row, allowing you to create different combinations of elements that span any number of columns. Column classes indicate the number of template columns to span (e.g., col-4 spans four). widths are set in percentages so you always have the same relative sizing.

Grid Options

Our grid system can adapt across all six default breakpoints, and any breakpoints you customize. The six default grid tiers are as follows:

  • Extra small (xs)
  • Small (sm)
  • Medium (md)
  • Large (lg)
  • Extra large (xl)
  • Extra extra large (xxl)

As noted above, each of these breakpoints have their own container, unique class prefix, and modifiers. Here's how the grid changes across these breakpoints:



xs
<576px
sm
≥576px
md
≥768px
lg
≥992px
xl
≥1200px
xxl
≥1400px
Container max-width None (auto) 540px 720px 960px 1140px 1320px
Class prefix .col- .col-sm- .col-md- .col-lg- .col-xl- .col-xxl-
# of columns 12


© Interactive Brokers LLC