Sharing size between different controls

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace SharedSizeTestApp
{
   /// <summary>
   /// Interaction logic for MainWindow.xaml
   /// </summary>
   public partial class MainWindow : Window
   {
      public MainWindow()
      {
         // create the list and some items for the ListBox part
         Items = new List<ItemType>();
         Items.Add(new ItemType(1, "Item 1", "This item 1", "This is some more info about item 1", "extra extra"));
         Items.Add(new ItemType(2, "Item 2", "This item 2", "This is some more info about item 2\nAnd even more info on this one", "extra extra"));
         Items.Add(new ItemType(3, "Item 3", "This item 3", "This is some more info about item 3", "extra extra"));

         InitializeComponent();
      }

      // List of items
      public IList<ItemType> Items { get; private set; }
   }

   // class to hold binding data for the ListBoxes
   public class ItemType
   {
      public ItemType(int uniqueId, string name, string someInfo, string someMoreInfo, string extraInfo)
      {
         UniqueId = uniqueId;
         Name = name;
         SomeInfo = someInfo;
         SomeMoreInfo = someMoreInfo;
         ExtraInfo = extraInfo;
      }
      
      public int UniqueId { get; private set; }
      public string Name { get; private set; }
      public string SomeInfo { get; private set; }
      public string SomeMoreInfo { get; private set; }
      public string ExtraInfo { get; private set; }
   }

   // Simple ValueConverter to convert a bool to Visibility
   public class BoolVisibilityConverter : IValueConverter
   {
      public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
      {
         return (value != null && (bool)value) ? Visibility.Visible : Visibility.Collapsed;
      }

      public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
      {
         throw new NotImplementedException();
      }
   }
}