diff --git a/turtle-lib/src/general/fontsize.rs b/turtle-lib/src/general/fontsize.rs
index 42f7fe2..802f1b4 100644
--- a/turtle-lib/src/general/fontsize.rs
+++ b/turtle-lib/src/general/fontsize.rs
@@ -49,7 +49,7 @@ impl From<f64> for FontSize {
 
 impl From<usize> for FontSize {
     fn from(size: usize) -> Self {
-        Self((size as u16).max(1))
+        Self(u16::try_from(size).unwrap_or(u16::MAX).max(1))
     }
 }