diff --git a/packages/@sanity/base/sanity.json b/packages/@sanity/base/sanity.json
index cb904efc19d..ea9615b90b5 100644
--- a/packages/@sanity/base/sanity.json
+++ b/packages/@sanity/base/sanity.json
@@ -607,6 +607,10 @@
       "name": "part:@sanity/base/plus-icon",
       "description": "Plus icon"
     },
+    {
+      "name": "part:@sanity/base/split-horizontal-icon",
+      "description": "Split horizontal icon"
+    },
     {
       "name": "part:@sanity/base/plus-circle-icon",
       "description": "Plus circle icon"
@@ -755,6 +759,10 @@
       "implements": "part:@sanity/base/plus-icon",
       "path": "components/icons/Plus.js"
     },
+    {
+      "implements": "part:@sanity/base/split-horizontal-icon",
+      "path": "components/icons/SplitHorizontal.js"
+    },
     {
       "implements": "part:@sanity/base/plus-circle-icon",
       "path": "components/icons/PlusCircle.js"
diff --git a/packages/@sanity/base/src/components/icons/CloseIcon.js b/packages/@sanity/base/src/components/icons/CloseIcon.js
index 53eb0af8b31..494dc6452b5 100644
--- a/packages/@sanity/base/src/components/icons/CloseIcon.js
+++ b/packages/@sanity/base/src/components/icons/CloseIcon.js
@@ -11,7 +11,7 @@ const CloseIcon = () => (
     width="1em"
     height="1em"
   >
-    <path d="M19 6L6 19M6 6L19 19" stroke="currentColor" style={strokeStyle} />
+    <path d="M18 7L7 18M7 7L18 18" stroke="currentColor" style={strokeStyle} />
   </svg>
 )
 
diff --git a/packages/@sanity/base/src/components/icons/SplitHorizontal.js b/packages/@sanity/base/src/components/icons/SplitHorizontal.js
new file mode 100644
index 00000000000..3454e3b47aa
--- /dev/null
+++ b/packages/@sanity/base/src/components/icons/SplitHorizontal.js
@@ -0,0 +1,19 @@
+import React from 'react'
+
+const strokeStyle = {vectorEffect: 'non-scaling-stroke'}
+
+const SplitHorizontalIcon = () => (
+  <svg
+    viewBox="0 0 25 25"
+    fill="none"
+    xmlns="http://www.w3.org/2000/svg"
+    preserveAspectRatio="xMidYMid"
+    width="1em"
+    height="1em"
+  >
+    <rect x="3.5" y="4.5" width="18" height="16" stroke="currentColor" style={strokeStyle} />
+    <line x1="12.5" y1="5" x2="12.5" y2="20" stroke="currentColor" style={strokeStyle} />
+  </svg>
+)
+
+export default SplitHorizontalIcon