diff --git a/doc/api/crypto.md b/doc/api/crypto.md
index cc310f67d1187c..1b30633221d895 100644
--- a/doc/api/crypto.md
+++ b/doc/api/crypto.md
@@ -1121,15 +1121,6 @@ exposes different functions.
 Most applications should consider using the new `KeyObject` API instead of
 passing keys as strings or `Buffer`s due to improved security features.
 
-### keyObject.asymmetricKeySize
-<!-- YAML
-added: REPLACEME
--->
-* {number}
-
-For asymmetric keys, this property represents the size of the embedded key in
-bytes. This property is `undefined` for symmetric keys.
-
 ### keyObject.asymmetricKeyType
 <!-- YAML
 added: v11.6.0
diff --git a/lib/internal/crypto/keys.js b/lib/internal/crypto/keys.js
index 2f4dce8a3b93b6..a0c2148b305b88 100644
--- a/lib/internal/crypto/keys.js
+++ b/lib/internal/crypto/keys.js
@@ -73,15 +73,9 @@ class SecretKeyObject extends KeyObject {
   }
 }
 
-const kAsymmetricKeySize = Symbol('kAsymmetricKeySize');
 const kAsymmetricKeyType = Symbol('kAsymmetricKeyType');
 
 class AsymmetricKeyObject extends KeyObject {
-  get asymmetricKeySize() {
-    return this[kAsymmetricKeySize] ||
-           (this[kAsymmetricKeySize] = this[kHandle].getAsymmetricKeySize());
-  }
-
   get asymmetricKeyType() {
     return this[kAsymmetricKeyType] ||
            (this[kAsymmetricKeyType] = this[kHandle].getAsymmetricKeyType());
diff --git a/src/node_crypto.cc b/src/node_crypto.cc
index 57c738e225b113..03ea9c3cf725ca 100644
--- a/src/node_crypto.cc
+++ b/src/node_crypto.cc
@@ -3329,8 +3329,6 @@ Local<Function> KeyObject::Initialize(Environment* env, Local<Object> target) {
   t->InstanceTemplate()->SetInternalFieldCount(1);
 
   env->SetProtoMethod(t, "init", Init);
-  env->SetProtoMethodNoSideEffect(t, "getAsymmetricKeySize",
-                                  GetAsymmetricKeySize);
   env->SetProtoMethodNoSideEffect(t, "getSymmetricKeySize",
                                   GetSymmetricKeySize);
   env->SetProtoMethodNoSideEffect(t, "getAsymmetricKeyType",
@@ -3376,11 +3374,6 @@ const char* KeyObject::GetSymmetricKey() const {
   return this->symmetric_key_.get();
 }
 
-size_t KeyObject::GetAsymmetricKeySize() const {
-  CHECK_NE(key_type_, kKeyTypeSecret);
-  return EVP_PKEY_size(this->asymmetric_key_.get());
-}
-
 size_t KeyObject::GetSymmetricKeySize() const {
   CHECK_EQ(key_type_, kKeyTypeSecret);
   return this->symmetric_key_len_;
@@ -3484,12 +3477,6 @@ void KeyObject::GetAsymmetricKeyType(const FunctionCallbackInfo<Value>& args) {
   args.GetReturnValue().Set(key->GetAsymmetricKeyType());
 }
 
-void KeyObject::GetAsymmetricKeySize(const FunctionCallbackInfo<Value>& args) {
-  KeyObject* key;
-  ASSIGN_OR_RETURN_UNWRAP(&key, args.Holder());
-  args.GetReturnValue().Set(static_cast<uint32_t>(key->GetAsymmetricKeySize()));
-}
-
 void KeyObject::GetSymmetricKeySize(const FunctionCallbackInfo<Value>& args) {
   KeyObject* key;
   ASSIGN_OR_RETURN_UNWRAP(&key, args.Holder());
diff --git a/src/node_crypto.h b/src/node_crypto.h
index c4477a12f6dd3f..982fc705434860 100644
--- a/src/node_crypto.h
+++ b/src/node_crypto.h
@@ -456,7 +456,6 @@ class KeyObject : public BaseObject {
   // only be used to implement cryptograohic operations requiring the key.
   ManagedEVPPKey GetAsymmetricKey() const;
   const char* GetSymmetricKey() const;
-  size_t GetAsymmetricKeySize() const;
   size_t GetSymmetricKeySize() const;
 
  protected:
@@ -471,9 +470,6 @@ class KeyObject : public BaseObject {
       const v8::FunctionCallbackInfo<v8::Value>& args);
   v8::Local<v8::String> GetAsymmetricKeyType() const;
 
-  static void GetAsymmetricKeySize(
-      const v8::FunctionCallbackInfo<v8::Value>& args);
-
   static void GetSymmetricKeySize(
       const v8::FunctionCallbackInfo<v8::Value>& args);
 
diff --git a/test/parallel/test-crypto-key-objects.js b/test/parallel/test-crypto-key-objects.js
index c324dea8f991a3..7075f4a2201d40 100644
--- a/test/parallel/test-crypto-key-objects.js
+++ b/test/parallel/test-crypto-key-objects.js
@@ -38,7 +38,6 @@ const privatePem = fixtures.readSync('test_rsa_privkey.pem', 'ascii');
   const key = createSecretKey(keybuf);
   assert.strictEqual(key.type, 'secret');
   assert.strictEqual(key.symmetricKeySize, 32);
-  assert.strictEqual(key.asymmetricKeySize, undefined);
   assert.strictEqual(key.asymmetricKeyType, undefined);
 
   const exportedKey = key.export();
@@ -92,13 +91,11 @@ const privatePem = fixtures.readSync('test_rsa_privkey.pem', 'ascii');
   const publicKey = createPublicKey(publicPem);
   assert.strictEqual(publicKey.type, 'public');
   assert.strictEqual(publicKey.asymmetricKeyType, 'rsa');
-  assert.strictEqual(publicKey.asymmetricKeySize, 128);
   assert.strictEqual(publicKey.symmetricKeySize, undefined);
 
   const privateKey = createPrivateKey(privatePem);
   assert.strictEqual(privateKey.type, 'private');
   assert.strictEqual(privateKey.asymmetricKeyType, 'rsa');
-  assert.strictEqual(privateKey.asymmetricKeySize, 128);
   assert.strictEqual(privateKey.symmetricKeySize, undefined);
 
   // It should be possible to derive a public key from a private key.
diff --git a/test/parallel/test-crypto-keygen.js b/test/parallel/test-crypto-keygen.js
index 8aae0d5e124e07..43f2196115816e 100644
--- a/test/parallel/test-crypto-keygen.js
+++ b/test/parallel/test-crypto-keygen.js
@@ -108,12 +108,10 @@ const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
   assert.strictEqual(typeof publicKey, 'object');
   assert.strictEqual(publicKey.type, 'public');
   assert.strictEqual(publicKey.asymmetricKeyType, 'rsa');
-  assert.strictEqual(publicKey.asymmetricKeySize, 64);
 
   assert.strictEqual(typeof privateKey, 'object');
   assert.strictEqual(privateKey.type, 'private');
   assert.strictEqual(privateKey.asymmetricKeyType, 'rsa');
-  assert.strictEqual(publicKey.asymmetricKeySize, 64);
 }
 
 {
@@ -455,7 +453,6 @@ const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
     assert.strictEqual(typeof publicKey, 'object');
     assert.strictEqual(publicKey.type, 'public');
     assert.strictEqual(publicKey.asymmetricKeyType, 'rsa');
-    assert.strictEqual(publicKey.asymmetricKeySize, 128);
 
     // The private key should still be a string.
     assert.strictEqual(typeof privateKey, 'string');
@@ -480,7 +477,6 @@ const sec1EncExp = (cipher) => getRegExpForPEM('EC PRIVATE KEY', cipher);
     assert.strictEqual(typeof privateKey, 'object');
     assert.strictEqual(privateKey.type, 'private');
     assert.strictEqual(privateKey.asymmetricKeyType, 'rsa');
-    assert.strictEqual(privateKey.asymmetricKeySize, 128);
 
     testEncryptDecrypt(publicKey, privateKey);
     testSignVerify(publicKey, privateKey);