diff --git a/css/theme/latex.css b/css/theme/latex.css
index 357232c..98c2ff2 100644
--- a/css/theme/latex.css
+++ b/css/theme/latex.css
@@ -85,6 +85,7 @@ body {
       object-fit: cover;
       margin: calc(.05 * var(--square)); }
       body .layout-preview img[src$="-crop.svg"] {
+        box-sizing: border-box;
         background: white;
         padding: calc(var(--margin) * var(--square));
         object-fit: contain;
diff --git a/css/theme/source/latex.scss b/css/theme/source/latex.scss
index 08c8f78..0be2e3a 100644
--- a/css/theme/source/latex.scss
+++ b/css/theme/source/latex.scss
@@ -118,6 +118,7 @@ body {
       object-fit: cover;
       margin: calc(.05 * var(--square));
       &[src$="-crop.svg"] {
+        box-sizing: border-box;
         background: white;
         padding: calc(var(--margin) * var(--square));
         object-fit: contain;