diff --git a/util/cpuid.c b/util/cpuid.c
index 50ab9ffbc..0f1f806a8 100644
--- a/util/cpuid.c
+++ b/util/cpuid.c
@@ -107,6 +107,22 @@ int main(int argc, const char* argv[]) {
     printf("Has SVE 0x%x\n", has_sve);
     printf("Has SVE2 0x%x\n", has_sve2);
     printf("Has SME 0x%x\n", has_sme);
+
+#if __aarch64__
+    // Read and print the SVE and SME vector lengths.
+    if (has_sve) {
+      int sve_vl;
+      // rdvl x0, #1
+      asm(".inst 0x04bf5020; mov %w0, w0" : "=r"(sve_vl)::"x0");
+      printf("SVE vector length: %d bytes\n", sve_vl);
+    }
+    if (has_sme) {
+      int sme_vl;
+      // rdsvl x0, #1
+      asm(".inst 0x04bf5820; mov %w0, w0" : "=r"(sme_vl)::"x0");
+      printf("SME vector length: %d bytes\n", sme_vl);
+    }
+#endif
   }
   if (has_riscv) {
     int has_rvv = TestCpuFlag(kCpuHasRVV);