diff --git a/crates/core_simd/src/fmt.rs b/crates/core_simd/src/fmt.rs
index e505947e1e65..c634e0546bc1 100644
--- a/crates/core_simd/src/fmt.rs
+++ b/crates/core_simd/src/fmt.rs
@@ -74,10 +74,10 @@ macro_rules! impl_fmt_trait {
 
 impl_fmt_trait! {
     integers:
-        crate::u8x2,    crate::u8x4,    crate::u8x8,    crate::u8x16,    crate::u8x32,    crate::u8x64,
-        crate::i8x2,    crate::i8x4,    crate::i8x8,    crate::i8x16,    crate::i8x32,    crate::i8x64,
-        crate::u16x2,   crate::u16x4,   crate::u16x8,   crate::u16x16,   crate::u16x32,
-        crate::i16x2,   crate::i16x4,   crate::i16x8,   crate::i16x16,   crate::i16x32,
+        crate::u8x8,    crate::u8x16,    crate::u8x32,    crate::u8x64,
+        crate::i8x8,    crate::i8x16,    crate::i8x32,    crate::i8x64,
+        crate::u16x4,   crate::u16x8,   crate::u16x16,   crate::u16x32,
+        crate::i16x4,   crate::i16x8,   crate::i16x16,   crate::i16x32,
         crate::u32x2,   crate::u32x4,   crate::u32x8,   crate::u32x16,
         crate::i32x2,   crate::i32x4,   crate::i32x8,   crate::i32x16,
         crate::u64x2,   crate::u64x4,   crate::u64x8,
@@ -96,8 +96,8 @@ impl_fmt_trait! {
 
 impl_fmt_trait! {
     masks:
-        crate::mask8x2,    crate::mask8x4,    crate::mask8x8,    crate::mask8x16,    crate::mask8x32,    crate::mask8x64,
-        crate::mask16x2,   crate::mask16x4,   crate::mask16x8,   crate::mask16x16,   crate::mask16x32,
+        crate::mask8x8,    crate::mask8x16,    crate::mask8x32,    crate::mask8x64,
+        crate::mask16x4,   crate::mask16x8,   crate::mask16x16,   crate::mask16x32,
         crate::mask32x2,   crate::mask32x4,   crate::mask32x8,   crate::mask32x16,
         crate::mask64x2,   crate::mask64x4,   crate::mask64x8,
         crate::mask128x2,  crate::mask128x4,
diff --git a/crates/core_simd/src/vectors_i16.rs b/crates/core_simd/src/vectors_i16.rs
index 011820e19c71..8aabd136b104 100644
--- a/crates/core_simd/src/vectors_i16.rs
+++ b/crates/core_simd/src/vectors_i16.rs
@@ -1,8 +1,3 @@
-define_integer_vector! {
-    /// Vector of two `i16` values
-    struct i16x2([i16; 2]);
-}
-
 define_integer_vector! {
     /// Vector of four `i16` values
     struct i16x4([i16; 4]);
diff --git a/crates/core_simd/src/vectors_i8.rs b/crates/core_simd/src/vectors_i8.rs
index fb739bc44fa8..3e52d894cc22 100644
--- a/crates/core_simd/src/vectors_i8.rs
+++ b/crates/core_simd/src/vectors_i8.rs
@@ -1,13 +1,3 @@
-define_integer_vector! {
-    /// Vector of two `i8` values
-    struct i8x2([i8; 2]);
-}
-
-define_integer_vector! {
-    /// Vector of four `i8` values
-    struct i8x4([i8; 4]);
-}
-
 define_integer_vector! {
     /// Vector of eight `i8` values
     struct i8x8([i8; 8]);
diff --git a/crates/core_simd/src/vectors_mask16.rs b/crates/core_simd/src/vectors_mask16.rs
index 8cbae6b7bbd2..406d7255a11e 100644
--- a/crates/core_simd/src/vectors_mask16.rs
+++ b/crates/core_simd/src/vectors_mask16.rs
@@ -1,10 +1,5 @@
 use crate::mask16;
 
-define_mask_vector! {
-    /// Vector of two `mask16` values
-    struct mask16x2([i16 as mask16; 2]);
-}
-
 define_mask_vector! {
     /// Vector of four `mask16` values
     struct mask16x4([i16 as mask16; 4]);
diff --git a/crates/core_simd/src/vectors_mask8.rs b/crates/core_simd/src/vectors_mask8.rs
index b6fbe5595189..d038b3361044 100644
--- a/crates/core_simd/src/vectors_mask8.rs
+++ b/crates/core_simd/src/vectors_mask8.rs
@@ -1,15 +1,5 @@
 use crate::mask8;
 
-define_mask_vector! {
-    /// Vector of two `mask8` values
-    struct mask8x2([i8 as mask8; 2]);
-}
-
-define_mask_vector! {
-    /// Vector of four `mask8` values
-    struct mask8x4([i8 as mask8; 4]);
-}
-
 define_mask_vector! {
     /// Vector of eight `mask8` values
     struct mask8x8([i8 as mask8; 8]);
diff --git a/crates/core_simd/src/vectors_u16.rs b/crates/core_simd/src/vectors_u16.rs
index 9e846a32efad..809ab10383cd 100644
--- a/crates/core_simd/src/vectors_u16.rs
+++ b/crates/core_simd/src/vectors_u16.rs
@@ -1,8 +1,3 @@
-define_integer_vector! {
-    /// Vector of two `u16` values
-    struct u16x2([u16; 2]);
-}
-
 define_integer_vector! {
     /// Vector of four `u16` values
     struct u16x4([u16; 4]);
diff --git a/crates/core_simd/src/vectors_u8.rs b/crates/core_simd/src/vectors_u8.rs
index d70de1a24c9d..a187bc6f7b42 100644
--- a/crates/core_simd/src/vectors_u8.rs
+++ b/crates/core_simd/src/vectors_u8.rs
@@ -1,13 +1,3 @@
-define_integer_vector! {
-    /// Vector of two `u8` values
-    struct u8x2([u8; 2]);
-}
-
-define_integer_vector! {
-    /// Vector of four `u8` values
-    struct u8x4([u8; 4]);
-}
-
 define_integer_vector! {
     /// Vector of eight `u8` values
     struct u8x8([u8; 8]);