diff --git a/.changeset/techdocs-dry-starfishes-carry.md b/.changeset/techdocs-dry-starfishes-carry.md
new file mode 100644
index 0000000000..f5841c6994
--- /dev/null
+++ b/.changeset/techdocs-dry-starfishes-carry.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-techdocs': patch
+---
+
+Add borders to TechDocs tables and increase font size. Fixes #5264 and #5276.
diff --git a/plugins/techdocs/src/reader/components/Reader.tsx b/plugins/techdocs/src/reader/components/Reader.tsx
index 67b39d0ef7..874ca5e018 100644
--- a/plugins/techdocs/src/reader/components/Reader.tsx
+++ b/plugins/techdocs/src/reader/components/Reader.tsx
@@ -162,6 +162,16 @@ export const Reader = ({ entityId, onReady }: Props) => {
         .md-typeset { font-size: 1rem; }
         .md-nav { font-size: 1rem; }
         .md-grid { max-width: 90vw; margin: 0 }
+        .md-typeset table:not([class]) {
+          font-size: 1rem;
+          border: 1px solid ${theme.palette.text.primary};
+          border-bottom: none;
+          border-collapse: collapse;
+        }
+        .md-typeset table:not([class]) td, .md-typeset table:not([class]) th {
+          border-bottom: 1px solid ${theme.palette.text.primary};
+        }
+        .md-typeset table:not([class]) th { font-weight: bold; }
         @media screen and (max-width: 76.1875em) {
           .md-nav { 
             background-color: ${theme.palette.background.default}; 
@@ -221,6 +231,7 @@ export const Reader = ({ entityId, onReady }: Props) => {
         :host {
           --md-tasklist-icon: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2A10 10 0 002 12a10 10 0 0010 10 10 10 0 0010-10A10 10 0 0012 2z"/></svg>');
           --md-tasklist-icon--checked: url('data:image/svg+xml;charset=utf-8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2C6.5 2 2 6.5 2 12s4.5 10 10 10 10-4.5 10-10S17.5 2 12 2m-2 15l-5-5 1.41-1.41L10 14.17l7.59-7.59L19 8l-9 9z"/></svg>');
+        }
         `,
       }),
     ]);