diff --git a/src/module.ts b/src/module.ts
index dee96ec3..0c65d044 100644
--- a/src/module.ts
+++ b/src/module.ts
@@ -30,11 +30,12 @@ export default defineNuxtModule<ModuleOptions>({
               description: 'Configure the defaults of Nuxt Icon'
             },
             size: {
-              $default: '',
+              $default: '1em',
               $schema: {
                 title: 'Icon Size',
-                description: 'Set the default icon size',
+                description: 'Set the default icon size. Set to false to disable the sizing of icon in style.',
                 tags: ['@studioIcon material-symbols:format-size-rounded'],
+                tsType: 'string | false'
               },
             },
             class: {
diff --git a/src/runtime/Icon.vue b/src/runtime/Icon.vue
index fb9d46bb..e7be3fc8 100644
--- a/src/runtime/Icon.vue
+++ b/src/runtime/Icon.vue
@@ -29,6 +29,10 @@ const iconName = computed(() => ((appConfig as any)?.nuxtIcon?.aliases || {})[pr
 const icon = computed<IconifyIcon | undefined>(() => state.value?.[iconName.value])
 const component = computed(() => nuxtApp.vueApp.component(iconName.value))
 const sSize = computed(() => {
+  // Disable size if appConfig.nuxtIcon.size === false
+  if (!props.size && typeof appConfig.nuxtIcon?.size === 'boolean' && !appConfig.nuxtIcon?.size) {
+    return undefined
+  }
   const size = props.size || appConfig.nuxtIcon?.size || '1em'
   if (String(Number(size)) === size) {
     return `${size}px`
diff --git a/src/runtime/IconCSS.vue b/src/runtime/IconCSS.vue
index f5b01384..16a24640 100644
--- a/src/runtime/IconCSS.vue
+++ b/src/runtime/IconCSS.vue
@@ -21,6 +21,10 @@ const props = defineProps({
 const iconName = computed(() => ((appConfig as any)?.nuxtIcon?.aliases || {})[props.name] || props.name)
 const iconUrl = computed(() => `url('https://api.iconify.design/${iconName.value.replace(':', '/')}.svg')`)
 const sSize = computed(() => {
+  // Disable size if appConfig.nuxtIcon.size === false
+  if (!props.size && typeof appConfig.nuxtIcon?.size === 'boolean' && !appConfig.nuxtIcon?.size) {
+    return undefined
+  }
   const size = props.size || appConfig.nuxtIcon?.size || '1em'
   if (String(Number(size)) === size) {
     return `${size}px`