diff --git a/src/data/datatypes.js b/src/data/datatypes.js
index b8260cd..2f588e2 100644
--- a/src/data/datatypes.js
+++ b/src/data/datatypes.js
@@ -1856,7 +1856,7 @@ const oraclesqlTypesBase = {
     hasCheck: true,
     isSized: true,
     hasPrecision: false,
-    defaultSize: 4000,
+    defaultSize: 255,
     hasQuotes: true,
   },
   NVARCHAR2: {
@@ -1870,7 +1870,7 @@ const oraclesqlTypesBase = {
     hasCheck: true,
     isSized: true,
     hasPrecision: false,
-    defaultSize: 4000,
+    defaultSize: 255,
     hasQuotes: true,
   },
   CHAR: {
@@ -2008,7 +2008,7 @@ const oraclesqlTypesBase = {
     hasCheck: false,
     isSized: true,
     hasPrecision: false,
-    defaultSize: 2000,
+    defaultSize: 255,
     hasQuotes: false,
   },
 };
diff --git a/src/utils/exportSQL/oraclesql.js b/src/utils/exportSQL/oraclesql.js
index 81d8081..490fe1f 100644
--- a/src/utils/exportSQL/oraclesql.js
+++ b/src/utils/exportSQL/oraclesql.js
@@ -2,6 +2,7 @@ import { dbToTypes } from "../../data/datatypes";
 import { parseDefault } from "./shared";
 
 export function toOracleSQL(diagram) {
+  console.log(diagram);
   return `${diagram.tables
     .map(
       (table) =>
@@ -12,9 +13,11 @@ export function toOracleSQL(diagram) {
             (field) =>
               `${field.comment === "" ? "" : `\t-- ${field.comment}\n`}\t"${
                 field.name
-              }" ${field.type}${field.size && Boolean(field.size.trim()) ? "(" + field.size + ")" : ""}${
-                field.notNull ? " NOT NULL" : ""
-              }${
+              }" ${field.type}${
+                field.size !== undefined && field.size !== ""
+                  ? "(" + field.size + ")"
+                  : ""
+              }${field.notNull ? " NOT NULL" : ""}${
                 field.increment ? " GENERATED ALWAYS AS IDENTITY" : ""
               }${field.unique ? " UNIQUE" : ""}${
                 field.default !== ""