diff --git a/index.css b/index.css
index 3236943..5111269 100644
--- a/index.css
+++ b/index.css
@@ -1849,3 +1849,176 @@
 		calc(--spacing(--value(integer, [integer])) * -1)
 	);
 }
+
+
+/* Base border utilities */
+@utility border-safe {
+	border-top-width: var(--twsa-safe-area-inset-top);
+	border-right-width: var(--twsa-safe-area-inset-right);
+	border-bottom-width: var(--twsa-safe-area-inset-bottom);
+	border-left-width: var(--twsa-safe-area-inset-left);
+}
+@utility border-x-safe {
+	border-right-width: var(--twsa-safe-area-inset-right);
+	border-left-width: var(--twsa-safe-area-inset-left);
+}
+@utility border-y-safe {
+	border-top-width: var(--twsa-safe-area-inset-top);
+	border-bottom-width: var(--twsa-safe-area-inset-bottom);
+}
+@utility border-s-safe {
+	border-inline-start-width: var(--twsa-safe-area-inset-left);
+}
+@utility border-e-safe {
+	border-inline-end-width: var(--twsa-safe-area-inset-right);
+}
+@utility border-t-safe {
+	border-top-width: var(--twsa-safe-area-inset-top);
+}
+@utility border-r-safe {
+	border-right-width: var(--twsa-safe-area-inset-right);
+}
+@utility border-b-safe {
+	border-bottom-width: var(--twsa-safe-area-inset-bottom);
+}
+@utility border-l-safe {
+	border-left-width: var(--twsa-safe-area-inset-left);
+}
+
+/* Border utilities with offset variant */
+@utility border-safe-offset-* {
+	border-top-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-top)
+	);
+	border-right-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-right)
+	);
+	border-bottom-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-bottom)
+	);
+	border-left-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-left)
+	);
+}
+@utility border-x-safe-offset-* {
+	border-right-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-right)
+	);
+	border-left-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-left)
+	);
+}
+@utility border-y-safe-offset-* {
+	border-top-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-top)
+	);
+	border-bottom-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-bottom)
+	);
+}
+@utility border-s-safe-offset-* {
+	border-inline-start-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-left)
+	);
+}
+@utility border-e-safe-offset-* {
+	border-inline-end-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-right)
+	);
+}
+@utility border-t-safe-offset-* {
+	border-top-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-top)
+	);
+}
+@utility border-r-safe-offset-* {
+	border-right-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-right)
+	);
+}
+@utility border-b-safe-offset-* {
+	border-bottom-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-bottom)
+	);
+}
+@utility border-l-safe-offset-* {
+	border-left-width: --spacing(
+		--value(integer, [integer]) + var(--twsa-safe-area-inset-left)
+	);
+}
+
+/* Border utilities with or variant */
+@utility border-safe-or-* {
+	border-top-width: max(
+		var(--twsa-safe-area-inset-top),
+		--spacing(--value(integer, [integer]))
+	);
+	border-right-width: max(
+		var(--twsa-safe-area-inset-right),
+		--spacing(--value(integer, [integer]))
+	);
+	border-bottom-width: max(
+		var(--twsa-safe-area-inset-bottom),
+		--spacing(--value(integer, [integer]))
+	);
+	border-left-width: max(
+		var(--twsa-safe-area-inset-left),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-x-safe-or-* {
+	border-right-width: max(
+		var(--twsa-safe-area-inset-right),
+		--spacing(--value(integer, [integer]))
+	);
+	border-left-width: max(
+		var(--twsa-safe-area-inset-left),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-y-safe-or-* {
+	border-top-width: max(
+		var(--twsa-safe-area-inset-top),
+		--spacing(--value(integer, [integer]))
+	);
+	border-bottom-width: max(
+		var(--twsa-safe-area-inset-bottom),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-s-safe-or-* {
+	border-inline-start-width: max(
+		var(--twsa-safe-area-inset-left),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-e-safe-or-* {
+	border-inline-end-width: max(
+		var(--twsa-safe-area-inset-right),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-t-safe-or-* {
+	border-top-width: max(
+		var(--twsa-safe-area-inset-top),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-r-safe-or-* {
+	border-right-width: max(
+		var(--twsa-safe-area-inset-right),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-b-safe-or-* {
+	border-bottom-width: max(
+		var(--twsa-safe-area-inset-bottom),
+		--spacing(--value(integer, [integer]))
+	);
+}
+@utility border-l-safe-or-* {
+	border-left-width: max(
+		var(--twsa-safe-area-inset-left),
+		--spacing(--value(integer, [integer]))
+	);
+}
diff --git a/test/main.js b/test/main.js
index 6accb42..e832142 100644
--- a/test/main.js
+++ b/test/main.js
@@ -384,4 +384,57 @@ describe("Safe Area Utilities", () => {
 			"--twsa-safe-area-inset-left": "0px",
 		});
 	});
+
+	test("border", () => {
+		expectSelectors([
+			".border-safe",
+			".border-x-safe",
+			".border-y-safe",
+			".border-s-safe",
+			".border-e-safe",
+			".border-t-safe",
+			".border-r-safe",
+			".border-b-safe",
+			".border-l-safe",
+		]);
+
+		expectCSSProperties(
+			Object.fromEntries(
+				directions.map((d) => [
+					`border-${d}-width`,
+					`var(--twsa-safe-area-inset-${d})`,
+				]),
+			),
+		);
+	});
+
+	test("border offset", () => {
+		expectSelectors([
+			".border-safe-offset-4",
+			".border-x-safe-offset-4",
+			".border-y-safe-offset-4",
+			".border-s-safe-offset-4",
+			".border-e-safe-offset-4",
+			".border-t-safe-offset-4",
+			".border-r-safe-offset-4",
+			".border-b-safe-offset-4",
+			".border-l-safe-offset-4",
+		]);
+	});
+
+	test("border or", () => {
+		expectSelectors([
+			".border-safe-or-4",
+			".border-x-safe-or-4",
+			".border-y-safe-or-4",
+			".border-s-safe-or-4",
+			".border-e-safe-or-4",
+			".border-t-safe-or-4",
+			".border-r-safe-or-4",
+			".border-b-safe-or-4",
+			".border-l-safe-or-4",
+		]);
+
+		ok(css.includes("max("));
+	});
 });