diff --git a/fpdf/html.py b/fpdf/html.py
index 0e80c4c24..1e6eddc26 100644
--- a/fpdf/html.py
+++ b/fpdf/html.py
@@ -1125,6 +1125,9 @@ def handle_starttag(self, tag: str, attrs: list[tuple[str, str | None]]) -> None
             if not self.table or not self.table_row:
                 raise FPDFException(f"Invalid HTML: <{tag}> used outside any <tr>")
             self.td_th = {k.lower(): v for k, v in attrs_dict.items()}
+            for dimension in ("width", "height"):
+            if dimension in self.td_th and self.td_th[dimension] is not None:
+                self.td_th[dimension] = self.td_th[dimension].replace("px", "").strip()
             self.td_th["tag"] = tag
             if tag == "th":
                 if "align" not in self.td_th: