diff --git a/common/reviews/api/tools.api.md b/common/reviews/api/tools.api.md
index e623166efe..87e37acf7f 100644
--- a/common/reviews/api/tools.api.md
+++ b/common/reviews/api/tools.api.md
@@ -2076,7 +2076,7 @@ function getBoundingBoxAroundShape(points: Types_2.Point3[], dimensions?: Types_
 function getBoundsIJKFromRectangleAnnotations(annotations: any, referenceVolume: any, options?: Options): any;
 
 // @public (undocumented)
-function getBrushSizeForToolGroup(toolGroupId: string): void;
+function getBrushSizeForToolGroup(toolGroupId: string, toolName?: string): void;
 
 // @public (undocumented)
 function getBrushThresholdForToolGroup(toolGroupId: string): any;
@@ -4677,7 +4677,7 @@ function setAnnotationVisibility(annotationUID: string, visible?: boolean): void
 function setAttributesIfNecessary(attributes: any, svgNode: any): void;
 
 // @public (undocumented)
-function setBrushSizeForToolGroup(toolGroupId: string, brushSize: number): void;
+function setBrushSizeForToolGroup(toolGroupId: string, brushSize: number, toolName?: string): void;
 
 // @public (undocumented)
 function setBrushThresholdForToolGroup(toolGroupId: string, threshold: Types_2.Point2): void;
diff --git a/packages/tools/src/tools/displayTools/Labelmap/labelmapDisplay.ts b/packages/tools/src/tools/displayTools/Labelmap/labelmapDisplay.ts
index 8dd38b422d..f86a6c842f 100644
--- a/packages/tools/src/tools/displayTools/Labelmap/labelmapDisplay.ts
+++ b/packages/tools/src/tools/displayTools/Labelmap/labelmapDisplay.ts
@@ -276,6 +276,9 @@ function _setLabelmapColorAndOpacity(
     isActiveLabelmap
   );
 
+  // Todo: the below loop probably can be optimized so that we don't hit it
+  // unless a config has changed. Right now we get into the following loop
+  // even for brush drawing which does not makes sense
   for (let i = 0; i < numColors; i++) {
     const segmentIndex = i;
     const segmentColor = colorLUT[segmentIndex];
diff --git a/packages/tools/src/tools/displayTools/SegmentationDisplayTool.ts b/packages/tools/src/tools/displayTools/SegmentationDisplayTool.ts
index 8ce0686265..6f98e72552 100644
--- a/packages/tools/src/tools/displayTools/SegmentationDisplayTool.ts
+++ b/packages/tools/src/tools/displayTools/SegmentationDisplayTool.ts
@@ -143,26 +143,20 @@ class SegmentationDisplayTool extends BaseTool {
         const config = this._getMergedRepresentationsConfig(toolGroupId);
 
         const viewportsRenderList = [];
+        const display =
+          representation.type === Representations.Labelmap
+            ? labelmapDisplay
+            : contourDisplay;
+
         for (const viewport of toolGroupViewports) {
-          if (representation.type == Representations.Labelmap) {
-            viewportsRenderList.push(
-              labelmapDisplay.render(
-                viewport as Types.IVolumeViewport,
-                representation,
-                config
-              )
-            );
-          } else if (representation.type == Representations.Contour) {
-            viewportsRenderList.push(
-              contourDisplay.render(
-                viewport as Types.IVolumeViewport,
-                representation,
-                config
-              )
-            );
-          }
-        }
+          const renderedViewport = display.render(
+            viewport as Types.IVolumeViewport,
+            representation,
+            config
+          );
 
+          viewportsRenderList.push(renderedViewport);
+        }
         return viewportsRenderList;
       }
     );
diff --git a/packages/tools/src/utilities/segmentation/brushSizeForToolGroup.ts b/packages/tools/src/utilities/segmentation/brushSizeForToolGroup.ts
index f544d553f0..c88d846086 100644
--- a/packages/tools/src/utilities/segmentation/brushSizeForToolGroup.ts
+++ b/packages/tools/src/utilities/segmentation/brushSizeForToolGroup.ts
@@ -4,9 +4,17 @@ import triggerAnnotationRenderForViewportIds from '../triggerAnnotationRenderFor
 import { getRenderingEngine } from '@cornerstonejs/core';
 import getBrushToolInstances from './utilities';
 
+/**
+ * Sets the brush size for all brush-based tools in a given tool group.
+ * @param toolGroupId - The ID of the tool group to set the brush size for.
+ * @param brushSize - The new brush size to set.
+ * @param toolName - The name of the specific tool to set the brush size for (optional)
+ * If not provided, all brush-based tools in the tool group will be affected.
+ */
 export function setBrushSizeForToolGroup(
   toolGroupId: string,
-  brushSize: number
+  brushSize: number,
+  toolName?: string
 ): void {
   const toolGroup = getToolGroup(toolGroupId);
 
@@ -14,7 +22,7 @@ export function setBrushSizeForToolGroup(
     return;
   }
 
-  const brushBasedToolInstances = getBrushToolInstances(toolGroupId);
+  const brushBasedToolInstances = getBrushToolInstances(toolGroupId, toolName);
 
   brushBasedToolInstances.forEach((tool: BrushTool) => {
     tool.configuration.brushSize = brushSize;
@@ -45,7 +53,17 @@ export function setBrushSizeForToolGroup(
   triggerAnnotationRenderForViewportIds(renderingEngine, viewportIds);
 }
 
-export function getBrushSizeForToolGroup(toolGroupId: string): void {
+/**
+ * Gets the brush size for the first brush-based tool instance in a given tool group.
+ * @param toolGroupId - The ID of the tool group to get the brush size for.
+ * @param toolName - The name of the specific tool to get the brush size for (Optional)
+ * If not provided, the first brush-based tool instance in the tool group will be used.
+ * @returns The brush size of the selected tool instance, or undefined if no brush-based tool instance is found.
+ */
+export function getBrushSizeForToolGroup(
+  toolGroupId: string,
+  toolName?: string
+): void {
   const toolGroup = getToolGroup(toolGroupId);
 
   if (toolGroup === undefined) {
@@ -58,7 +76,7 @@ export function getBrushSizeForToolGroup(toolGroupId: string): void {
     return;
   }
 
-  const brushBasedToolInstances = getBrushToolInstances(toolGroupId);
+  const brushBasedToolInstances = getBrushToolInstances(toolGroupId, toolName);
 
   // one is enough as they share the same brush size
   const brushToolInstance = brushBasedToolInstances[0];
diff --git a/packages/tools/src/utilities/segmentation/utilities.ts b/packages/tools/src/utilities/segmentation/utilities.ts
index 0dc50fd820..840d9fc565 100644
--- a/packages/tools/src/utilities/segmentation/utilities.ts
+++ b/packages/tools/src/utilities/segmentation/utilities.ts
@@ -10,7 +10,10 @@ export type ThresholdInformation = {
   upper: number;
 };
 
-export default function getBrushToolInstances(toolGroupId) {
+export default function getBrushToolInstances(
+  toolGroupId: string,
+  toolName?: string
+) {
   const toolGroup = getToolGroup(toolGroupId);
 
   if (toolGroup === undefined) {
@@ -23,6 +26,10 @@ export default function getBrushToolInstances(toolGroupId) {
     return;
   }
 
+  if (toolName && toolInstances[toolName]) {
+    return [toolInstances[toolName]];
+  }
+
   // For each tool that has BrushTool as base class, set the brush size.
   const brushBasedToolInstances = Object.values(toolInstances).filter(
     (toolInstance) => toolInstance instanceof BrushTool