diff --git a/sse4_1.hh b/sse4_1.hh
index 42ec37d..4c81852 100644
--- a/sse4_1.hh
+++ b/sse4_1.hh
@@ -12,7 +12,7 @@ Copyright 2018 Ahmet Inan <inan@aicodix.de>
 template <>
 union SIMD<float, 4>
 {
-	static const int SIZE = 8;
+	static const int SIZE = 4;
 	typedef float value_type;
 	typedef uint32_t uint_type;
 	__m128 m;
@@ -23,7 +23,7 @@ union SIMD<float, 4>
 template <>
 union SIMD<double, 2>
 {
-	static const int SIZE = 4;
+	static const int SIZE = 2;
 	typedef double value_type;
 	typedef uint64_t uint_type;
 	__m128d m;
@@ -34,7 +34,7 @@ union SIMD<double, 2>
 template <>
 union SIMD<int8_t, 16>
 {
-	static const int SIZE = 32;
+	static const int SIZE = 16;
 	typedef int8_t value_type;
 	typedef uint8_t uint_type;
 	__m128i m;
@@ -45,7 +45,7 @@ union SIMD<int8_t, 16>
 template <>
 union SIMD<int16_t, 8>
 {
-	static const int SIZE = 16;
+	static const int SIZE = 8;
 	typedef int16_t value_type;
 	typedef uint16_t uint_type;
 	__m128i m;
@@ -56,7 +56,7 @@ union SIMD<int16_t, 8>
 template <>
 union SIMD<int32_t, 4>
 {
-	static const int SIZE = 8;
+	static const int SIZE = 4;
 	typedef int32_t value_type;
 	typedef uint32_t uint_type;
 	__m128i m;
@@ -67,7 +67,7 @@ union SIMD<int32_t, 4>
 template <>
 union SIMD<int64_t, 2>
 {
-	static const int SIZE = 4;
+	static const int SIZE = 2;
 	typedef int64_t value_type;
 	typedef uint64_t uint_type;
 	__m128i m;
@@ -78,7 +78,7 @@ union SIMD<int64_t, 2>
 template <>
 union SIMD<uint8_t, 16>
 {
-	static const int SIZE = 32;
+	static const int SIZE = 16;
 	typedef uint8_t value_type;
 	typedef uint8_t uint_type;
 	__m128i m;
@@ -89,7 +89,7 @@ union SIMD<uint8_t, 16>
 template <>
 union SIMD<uint16_t, 8>
 {
-	static const int SIZE = 16;
+	static const int SIZE = 8;
 	typedef uint16_t value_type;
 	typedef uint16_t uint_type;
 	__m128i m;
@@ -100,7 +100,7 @@ union SIMD<uint16_t, 8>
 template <>
 union SIMD<uint32_t, 4>
 {
-	static const int SIZE = 8;
+	static const int SIZE = 4;
 	typedef uint32_t value_type;
 	typedef uint32_t uint_type;
 	__m128i m;
@@ -111,7 +111,7 @@ union SIMD<uint32_t, 4>
 template <>
 union SIMD<uint64_t, 2>
 {
-	static const int SIZE = 4;
+	static const int SIZE = 2;
 	typedef uint64_t value_type;
 	typedef uint64_t uint_type;
 	__m128i m;