diff --git a/packages/core/src/components/toast/_toast.scss b/packages/core/src/components/toast/_toast.scss
index c9dc814c63..29ba1ecbe6 100644
--- a/packages/core/src/components/toast/_toast.scss
+++ b/packages/core/src/components/toast/_toast.scss
@@ -103,8 +103,8 @@ $toast-intent-colors: (
   box-shadow: $pt-toast-box-shadow;
   display: flex;
   margin: $toast-margin 0 0;
-  max-width: $toast-max-width;
-  min-width: $toast-min-width;
+  max-width: min($toast-max-width, 100%);
+  min-width: min($toast-min-width, 100%);
 
   // toast is interactive even though container isn't
   pointer-events: all;