diff --git a/src/Window.cpp b/src/Window.cpp
index eacce1e1..7e7dce52 100644
--- a/src/Window.cpp
+++ b/src/Window.cpp
@@ -477,6 +477,10 @@ void CWindow::applyDynamicRule(const SWindowRule& r) {
         try {
             m_sAdditionalConfigData.rounding = std::stoi(r.szRule.substr(r.szRule.find_first_of(' ') + 1));
         } catch (std::exception& e) { Debug::log(ERR, "Rounding rule \"%s\" failed with: %s", r.szRule.c_str(), e.what()); }
+    } else if (r.szRule.find("bordersize") == 0) {
+        try {
+            m_sAdditionalConfigData.borderSize = std::stoi(r.szRule.substr(r.szRule.find_first_of(' ') + 1));
+        } catch (std::exception& e) { Debug::log(ERR, "Bordersize rule \"%s\" failed with: %s", r.szRule.c_str(), e.what()); }
     } else if (r.szRule.find("opacity") == 0) {
         try {
             CVarList vars(r.szRule, 0, ' ');
@@ -536,6 +540,7 @@ void CWindow::updateDynamicRules() {
     m_sAdditionalConfigData.rounding       = -1;
     m_sAdditionalConfigData.dimAround      = false;
     m_sAdditionalConfigData.forceRGBX      = false;
+    m_sAdditionalConfigData.borderSize     = -1;
 
     const auto WINDOWRULES = g_pConfigManager->getMatchingRules(this);
     for (auto& r : WINDOWRULES) {
diff --git a/src/Window.hpp b/src/Window.hpp
index 3bb00f00..b2260d6e 100644
--- a/src/Window.hpp
+++ b/src/Window.hpp
@@ -122,6 +122,7 @@ struct SWindowAdditionalConfigData {
     CWindowOverridableVar<bool> noMaxSize             = false;
     CWindowOverridableVar<bool> dimAround             = false;
     CWindowOverridableVar<bool> forceRGBX             = false;
+    CWindowOverridableVar<int>  borderSize            = -1; // -1 means unset, takes precedence over the renderdata one
 };
 
 struct SWindowRule {
diff --git a/src/config/ConfigManager.cpp b/src/config/ConfigManager.cpp
index 27ecf58a..c61bd15c 100644
--- a/src/config/ConfigManager.cpp
+++ b/src/config/ConfigManager.cpp
@@ -880,7 +880,7 @@ bool windowRuleValid(const std::string& RULE) {
              RULE != "noshadow" && RULE != "nodim" && RULE != "noborder" && RULE != "center" && RULE != "opaque" && RULE != "forceinput" && RULE != "fullscreen" &&
              RULE != "nofullscreenrequest" && RULE != "fakefullscreen" && RULE != "nomaxsize" && RULE != "pin" && RULE != "noanim" && RULE != "dimaround" &&
              RULE != "windowdance" && RULE != "maximize" && RULE.find("animation") != 0 && RULE.find("rounding") != 0 && RULE.find("workspace") != 0 &&
-             RULE.find("bordercolor") != 0 && RULE != "forcergbx" && RULE != "noinitialfocus" && RULE != "stayfocused");
+             RULE.find("bordercolor") != 0 && RULE != "forcergbx" && RULE != "noinitialfocus" && RULE != "stayfocused" && RULE.find("bordersize") != 0);
 }
 
 bool layerRuleValid(const std::string& RULE) {
diff --git a/src/layout/DwindleLayout.cpp b/src/layout/DwindleLayout.cpp
index 604758bc..c1b33bd5 100644
--- a/src/layout/DwindleLayout.cpp
+++ b/src/layout/DwindleLayout.cpp
@@ -127,6 +127,8 @@ void CHyprDwindleLayout::applyNodeDataToWindow(SDwindleNodeData* pNode, bool for
     auto               gapsOut = WORKSPACERULE.gapsOut.value_or(*PGAPSOUT);
     auto               borderSize =
         PWINDOW->m_sSpecialRenderData.borderSize.toUnderlying() != -1 ? PWINDOW->m_sSpecialRenderData.borderSize.toUnderlying() : WORKSPACERULE.borderSize.value_or(*PBORDERSIZE);
+    if (PWINDOW->m_sAdditionalConfigData.borderSize.toUnderlying() != -1)
+        borderSize = PWINDOW->m_sAdditionalConfigData.borderSize.toUnderlying();
 
     if (!g_pCompositor->windowExists(PWINDOW) || !PWINDOW->m_bIsMapped) {
         Debug::log(ERR, "Node %lx holding invalid window %lx!!", pNode, PWINDOW);
diff --git a/src/layout/MasterLayout.cpp b/src/layout/MasterLayout.cpp
index e0000914..5a9d252e 100644
--- a/src/layout/MasterLayout.cpp
+++ b/src/layout/MasterLayout.cpp
@@ -294,7 +294,7 @@ void CHyprMasterLayout::calculateWorkspace(const int& ws) {
     if ((WINDOWS < 2) && !centerMasterWindow) {
         PMASTERNODE->position = PMONITOR->vecReservedTopLeft + PMONITOR->vecPosition;
         PMASTERNODE->size     = Vector2D(PMONITOR->vecSize.x - PMONITOR->vecReservedTopLeft.x - PMONITOR->vecReservedBottomRight.x,
-                                         PMONITOR->vecSize.y - PMONITOR->vecReservedBottomRight.y - PMONITOR->vecReservedTopLeft.y);
+                                     PMONITOR->vecSize.y - PMONITOR->vecReservedBottomRight.y - PMONITOR->vecReservedTopLeft.y);
         applyNodeDataToWindow(PMASTERNODE);
         return;
     } else if (orientation == ORIENTATION_LEFT || orientation == ORIENTATION_RIGHT || (orientation == ORIENTATION_CENTER && STACKWINDOWS <= 1)) {
@@ -515,6 +515,8 @@ void CHyprMasterLayout::applyNodeDataToWindow(SMasterNodeData* pNode) {
     auto               gapsOut = WORKSPACERULE.gapsOut.value_or(*PGAPSOUT);
     auto               borderSize =
         PWINDOW->m_sSpecialRenderData.borderSize.toUnderlying() != -1 ? PWINDOW->m_sSpecialRenderData.borderSize.toUnderlying() : WORKSPACERULE.borderSize.value_or(*PBORDERSIZE);
+    if (PWINDOW->m_sAdditionalConfigData.borderSize.toUnderlying() != -1)
+        borderSize = PWINDOW->m_sAdditionalConfigData.borderSize.toUnderlying();
 
     if (!g_pCompositor->windowValidMapped(PWINDOW)) {
         Debug::log(ERR, "Node %lx holding invalid window %lx!!", pNode, PWINDOW);
diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 59f935b1..f6a7132d 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -357,13 +357,15 @@ void CHyprRenderer::renderWindow(CWindow* pWindow, CMonitor* pMonitor, timespec*
 
             scaleBox(&windowBox, pMonitor->scale);
 
-            const int BORDERSIZE = pWindow->m_sSpecialRenderData.borderSize.toUnderlying() == -1 ? *PBORDERSIZE : pWindow->m_sSpecialRenderData.borderSize.toUnderlying();
+            int borderSize = pWindow->m_sSpecialRenderData.borderSize.toUnderlying() == -1 ? *PBORDERSIZE : pWindow->m_sSpecialRenderData.borderSize.toUnderlying();
+            if (pWindow->m_sAdditionalConfigData.borderSize.toUnderlying() != -1)
+                borderSize = pWindow->m_sAdditionalConfigData.borderSize.toUnderlying();
 
-            g_pHyprOpenGL->renderBorder(&windowBox, grad, rounding, BORDERSIZE, a1);
+            g_pHyprOpenGL->renderBorder(&windowBox, grad, rounding, borderSize, a1);
 
             if (ANIMATED) {
                 float a2 = renderdata.fadeAlpha * renderdata.alpha * (1.f - g_pHyprOpenGL->m_pCurrentWindow->m_fBorderFadeAnimationProgress.fl());
-                g_pHyprOpenGL->renderBorder(&windowBox, g_pHyprOpenGL->m_pCurrentWindow->m_cRealBorderColorPrevious, rounding, BORDERSIZE, a2);
+                g_pHyprOpenGL->renderBorder(&windowBox, g_pHyprOpenGL->m_pCurrentWindow->m_cRealBorderColorPrevious, rounding, borderSize, a2);
             }
         }
     }