diff --git a/CHANGELOG.md b/CHANGELOG.md
index 010cf12ca..8d9f36218 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -21,6 +21,10 @@
 
 * perf: optimize package monitoring in helpServer.R
 
+### Other
+
+* Remove the unused `r.workspaceViewer.showObjectSize` setting and obsolete object-size tooltip support
+
 ### Styling
 
 * style: fix line length lint error in sess/R/rstudioapi.R
diff --git a/package.json b/package.json
index f28130c91..6eb357211 100644
--- a/package.json
+++ b/package.json
@@ -1755,11 +1755,6 @@
           "default": 8,
           "markdownDescription": "Delay in milliseconds before sending each line to rterm. Requires `#r.bracketedPaste#` to be `false`."
         },
-        "r.workspaceViewer.showObjectSize": {
-          "type": "boolean",
-          "default": false,
-          "markdownDescription": "Show object size when hovering over a workspace viewer item."
-        },
         "r.workspaceViewer.removeHiddenItems": {
           "type": "boolean",
           "default": false,
@@ -2052,4 +2047,4 @@
   "extensionDependencies": [
     "REditorSupport.r-syntax"
   ]
-}
\ No newline at end of file
+}
diff --git a/src/session.ts b/src/session.ts
index 6e13e1af2..9fd9125f2 100644
--- a/src/session.ts
+++ b/src/session.ts
@@ -30,7 +30,6 @@ export interface GlobalEnv {
         type: string;
         length: number;
         str: string;
-        size?: number;
         dim?: number[],
         names?: string[],
         slots?: string[],
diff --git a/src/test/testdata/session/workspace.json b/src/test/testdata/session/workspace.json
index 7421ea5c9..daa6a735b 100644
--- a/src/test/testdata/session/workspace.json
+++ b/src/test/testdata/session/workspace.json
@@ -34,7 +34,6 @@
             ],
             "type": "character",
             "length": 1,
-            "size": 112,
             "str": "chr \"a\""
         },
         "b": {
@@ -43,7 +42,6 @@
             ],
             "type": "integer",
             "length": 1,
-            "size": 56,
             "str": "int 1"
         },
         "c": {
@@ -52,7 +50,6 @@
             ],
             "type": "double",
             "length": 1,
-            "size": 56,
             "str": "num 1.5"
         },
         "d": {
@@ -61,7 +58,6 @@
             ],
             "type": "complex",
             "length": 1,
-            "size": 64,
             "str": "cplx 0+0i"
         },
         "e": {
@@ -70,7 +66,6 @@
             ],
             "type": "logical",
             "length": 1,
-            "size": 56,
             "str": "logi TRUE"
         },
         "f": {
@@ -79,7 +74,6 @@
             ],
             "type": "closure",
             "length": 1,
-            "size": 1240,
             "str": "function (x, ...)"
         },
         "g": {
@@ -88,7 +82,6 @@
             ],
             "type": "environment",
             "length": 11,
-            "size": 56,
             "str": "<environment: R_GlobalEnv>",
             "names": [
                 "a",
@@ -110,7 +103,6 @@
             ],
             "type": "list",
             "length": 2,
-            "size": 520,
             "str": "List of 2\n $ a: num 1\n $ b: chr \"foo\"",
             "names": [
                 "a",
@@ -123,7 +115,6 @@
             ],
             "type": "list",
             "length": 11,
-            "size": 7208,
             "str": "'data.frame':\t32 obs. of  11 variables:\n $ mpg : num  21 21 ...\n $ cyl : num  6 6 ...\n $ disp: num  160 160 ...\n $ hp  : num  110 110 ...\n $ drat: num  3.9 3.9 ...\n $ wt  : num  2.62 ...\n $ qsec: num  16.5 ...\n $ vs  : num  0 0 ...\n $ am  : num  1 1 ...\n $ gear: num  4 4 ...\n $ carb: num  4 4 ...",
             "names": [
                 "mpg",
diff --git a/src/workspaceViewer.ts b/src/workspaceViewer.ts
index 12a9f6288..14162fb47 100644
--- a/src/workspaceViewer.ts
+++ b/src/workspaceViewer.ts
@@ -145,7 +145,6 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
                         child.class,
                         child.str.replace(/\s+/g, ' ').trim(),
                         child.type,
-                        0,
                         element.treeLevel + 1,
                         undefined,
                         child.has_children,
@@ -175,7 +174,6 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
             rClass: string,
             str: string,
             type: string,
-            size?: number,
             dim?: number[],
             hasChildren?: boolean
         ): GlobalEnvItem => {
@@ -184,7 +182,6 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
                 rClass,
                 str,
                 type,
-                size,
                 TreeLevel.Parent,
                 dim,
                 hasChildren,
@@ -197,7 +194,6 @@ export class WorkspaceDataProvider implements TreeDataProvider<TreeItem> {
                 getFirstClass(globalenv[key].class),
                 globalenv[key].str,
                 globalenv[key].type,
-                globalenv[key].size,
                 globalenv[key].dim,
                 globalenv[key].has_children,
             )) : [];
@@ -350,7 +346,6 @@ export class GlobalEnvItem extends TreeItem {
         rClass: string,
         str: string,
         type: string,
-        size?: number,
         treeLevel?: number,
         dim?: number[],
         hasChildren?: boolean,
@@ -372,7 +367,7 @@ export class GlobalEnvItem extends TreeItem {
             rClass,
             type
         );
-        this.tooltip = this.getTooltip(label, rClass, size, treeLevel);
+        this.tooltip = this.getTooltip(label, rClass, treeLevel);
         this.iconPath = this.getIcon(type, dim);
         this.contextValue = treeLevel === 0 ? 'rootNode' : `childNode${this.treeLevel}`;
     }
@@ -389,24 +384,12 @@ export class GlobalEnvItem extends TreeItem {
         }
     }
 
-    private getSizeString(bytes: number): string {
-        if (bytes < 1024) {
-            return `${bytes} bytes`;
-        } else {
-            const e = Math.floor(Math.log(bytes) / Math.log(1024));
-            return (bytes / Math.pow(1024, e)).toFixed(0) + 'KMGTP'.charAt(e - 1) + 'b';
-        }
-    }
-
     private getTooltip(
         label: string,
         rClass: string,
-        size?: number,
         treeLevel?: number
     ): string {
-        if (size && treeLevel === TreeLevel.Parent) {
-            return `${label} (${rClass}, ${this.getSizeString(size)})`;
-        } else if (treeLevel === TreeLevel.Scalar) {
+        if (treeLevel === TreeLevel.Scalar) {
             return '';
         } else {
             return `${label} (${rClass})`;