diff --git a/mainhall/index.html b/mainhall/index.html
index fb0f6e3..57984c5 100644
--- a/mainhall/index.html
+++ b/mainhall/index.html
@@ -76,8 +76,8 @@
         padding-right: 3vw;
       }
       #bar-history cbase-polar {
-        width: 30vmin;
-        height: 30vmin;
+        width: 40vmin;
+        height: 40vmin;
         display: block;
         margin-left: auto;
         margin-right: auto;
@@ -101,7 +101,7 @@
       </section>
       <section id="bar-history">
         <h2>bar (last 7d)</h2>
-        <cbase-polar timeseries="bar.open" days="7" size="30" percentage></cbase-polar>
+        <cbase-polar timeseries="bar.open" days="7" size="40" percentage></cbase-polar>
       </section>
     </main>
     <h1 id="screen-title">c-base space station</h1>
diff --git a/weltenbaulab/index.html b/weltenbaulab/index.html
index 45f310e..c061f2c 100644
--- a/weltenbaulab/index.html
+++ b/weltenbaulab/index.html
@@ -43,8 +43,8 @@
         margin-bottom: 1vh;
       }
       cbase-polar {
-        width: 30vmin;
-        height: 30vmin;
+        width: 40vmin;
+        height: 40vmin;
         display: block;
         margin-left: auto;
         margin-right: auto;
@@ -109,7 +109,7 @@
       </section>
       <section id="lab-history">
         <h2>c-lab (last 9d)</h2>
-        <cbase-polar timeseries="clima.light.c_lab" days="9" size="30" percentage></cbase-polar>
+        <cbase-polar timeseries="clima.light.c_lab" days="9" size="40" percentage></cbase-polar>
       </section>
     </main>
     <h1 id="screen-title">weltenbaulab</h1>