title: How to specify the width of a sidebarPanel in pixels?
body: <p>How to specify the width of a <code>sidebarPanel</code>in pixels? The <code>width</code> argument is not accurate enough in my case.</p>
  
  <pre><code>library(shiny)
  
  ui &lt;- fluidPage(
    sidebarLayout(
      sidebarPanel(width = 5), # This is not accurate enough!
      mainPanel()))
  
  server &lt;- function(input, output, session) {}
  
  shinyApp(ui, server)
  </code></pre>