diff --git a/observe_main.html b/observe_main.html
index 39cdcf2..54ae61b 100644
--- a/observe_main.html
+++ b/observe_main.html
@@ -99,15 +99,15 @@
         </form>
 
         <div id="organism" class="row align-items-end">
-          <div class="col" name="Length" >
+          <div class="col-5" name="Length" >
             <label class = "form-label" for="org-length">Length [-]</label>
             <input class="form-control" type="text" name="Length" id="org-length" value=0> </input>
           </div>
-          <div class="col" name="Width">
+          <div class="col-4" name="Width">
             <label class = "form-label" for="org-width">Width [-]</label>
             <input class="form-control" type="text" name="Width" value=0 id="org-width"> </input>
           </div>
-          <div class="col" name="Colour">
+          <div class="col-3" name="Colour">
             <label class = "form-label" for="org-colour">Colour</label>
             <input class="form-control" type="text" name="Colour" value="" id="org-colour"> </input>
           </div>