diff --git a/src/panels/marginal.js b/src/panels/marginal.js
index da30e37..204c690 100644
--- a/src/panels/marginal.js
+++ b/src/panels/marginal.js
@@ -39,8 +39,10 @@ Monocle.Panels.Marginal = function (flipper, evtCallbacks) {
     var sheaf = page.m.sheafDiv;
     var bw = sheaf.offsetLeft;
     var fw = page.offsetWidth - (sheaf.offsetLeft + sheaf.offsetWidth);
-    bw = Math.floor(((bw - 2) / page.offsetWidth) * 10000 / 100 ) + "%";
-    fw = Math.floor(((fw - 2) / page.offsetWidth) * 10000 / 100 ) + "%";
+    bw = Math.round(((bw - 2) / page.offsetWidth) * 10000 / 100 );
+    fw = Math.round(((fw - 2) / page.offsetWidth) * 10000 / 100 );
+    bw = Math.max(bw, 5) + "%";
+    fw = Math.max(fw, 5) + "%";
     p.panels.forwards.properties.div.style.width = fw;
     p.panels.backwards.properties.div.style.width = bw;
   }