diff --git a/.changeset/tricky-elephants-deliver.md b/.changeset/tricky-elephants-deliver.md
new file mode 100644
index 00000000..2b8c2cab
--- /dev/null
+++ b/.changeset/tricky-elephants-deliver.md
@@ -0,0 +1,5 @@
+---
+"@indielayer/ui": patch
+---
+
+fix: modal handling 'full' size option.
diff --git a/packages/ui/src/components/modal/theme/Modal.base.theme.ts b/packages/ui/src/components/modal/theme/Modal.base.theme.ts
index 6e9c8c9d..d1a61e81 100644
--- a/packages/ui/src/components/modal/theme/Modal.base.theme.ts
+++ b/packages/ui/src/components/modal/theme/Modal.base.theme.ts
@@ -31,9 +31,9 @@ const theme: ModalTheme = {
 
       if (props.size === 'xs') classes.push('sm:max-w-xs')
       else if (props.size === 'sm') classes.push('sm:max-w-sm')
-      else if (props.size === 'lg') classes.push('sm:max-w-xl')
-      else if (props.size === 'xl') classes.push('sm:max-w-3xl')
-      else classes.push('sm:max-w-lg')
+      else if (props.size === 'md') classes.push('sm:max-w-lg')
+      else if (props.size === 'lg') classes.push('sm:max-w-3xl')
+      else if (props.size === 'xl') classes.push('sm:max-w-6xl')
 
       return classes
     },
diff --git a/packages/ui/src/components/modal/theme/Modal.carbon.theme.ts b/packages/ui/src/components/modal/theme/Modal.carbon.theme.ts
index 20683dd2..58751bc8 100644
--- a/packages/ui/src/components/modal/theme/Modal.carbon.theme.ts
+++ b/packages/ui/src/components/modal/theme/Modal.carbon.theme.ts
@@ -21,9 +21,9 @@ const theme: ModalTheme = {
 
       if (props.size === 'xs') classes.push('sm:max-w-xs')
       else if (props.size === 'sm') classes.push('sm:max-w-sm')
-      else if (props.size === 'lg') classes.push('sm:max-w-xl')
-      else if (props.size === 'xl') classes.push('sm:max-w-3xl')
-      else classes.push('sm:max-w-lg')
+      else if (props.size === 'md') classes.push('sm:max-w-lg')
+      else if (props.size === 'lg') classes.push('sm:max-w-3xl')
+      else if (props.size === 'xl') classes.push('sm:max-w-6xl')
 
       return classes
     },