diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTAlignedQuad.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTAlignedQuad.java
index 681197c2..0cd1257b 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTAlignedQuad.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTAlignedQuad.java
@@ -67,6 +67,13 @@ public STBTTAlignedQuad(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public static STBTTAlignedQuad create(SegmentAllocator allocator) {
         return new STBTTAlignedQuad(allocator.allocate(LAYOUT));
     }
diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTBakedChar.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTBakedChar.java
index 50d66c57..cdd44e92 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTBakedChar.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTBakedChar.java
@@ -62,7 +62,7 @@ public sealed class STBTTBakedChar extends Struct {
         yoff = LAYOUT.varHandle(PathElement.groupElement("yoff")),
         xadvance = LAYOUT.varHandle(PathElement.groupElement("xadvance"));
 
-    public STBTTBakedChar(MemorySegment address, MemoryLayout layout) {
+    protected STBTTBakedChar(MemorySegment address, MemoryLayout layout) {
         super(address, layout);
     }
 
@@ -70,6 +70,13 @@ public STBTTBakedChar(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public static Buffer create(SegmentAllocator allocator, long count) {
         return new Buffer(allocator.allocateArray(LAYOUT, count), count);
     }
diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTKerningEntry.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTKerningEntry.java
index 8d2d94d4..5620f22e 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTKerningEntry.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTKerningEntry.java
@@ -54,7 +54,7 @@ public sealed class STBTTKerningEntry extends Struct {
         glyph2 = LAYOUT.varHandle(PathElement.groupElement("glyph2")),
         advance = LAYOUT.varHandle(PathElement.groupElement("advance"));
 
-    public STBTTKerningEntry(MemorySegment address, MemoryLayout layout) {
+    protected STBTTKerningEntry(MemorySegment address, MemoryLayout layout) {
         super(address, layout);
     }
 
@@ -62,6 +62,13 @@ public STBTTKerningEntry(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public int glyph1() {
         return (int) glyph1.get(segment());
     }
diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackRange.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackRange.java
index 01ed1c2a..6b150060 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackRange.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackRange.java
@@ -65,7 +65,7 @@ public sealed class STBTTPackRange extends Struct {
         num_chars = LAYOUT.varHandle(PathElement.groupElement("num_chars")),
         chardata_for_range = LAYOUT.varHandle(PathElement.groupElement("chardata_for_range"));
 
-    public STBTTPackRange(MemorySegment address, MemoryLayout layout) {
+    protected STBTTPackRange(MemorySegment address, MemoryLayout layout) {
         super(address, layout);
     }
 
@@ -73,6 +73,13 @@ public STBTTPackRange(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public static STBTTPackRange create(SegmentAllocator allocator) {
         return new STBTTPackRange(allocator.allocate(LAYOUT));
     }
diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackedChar.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackedChar.java
index ee2a5e04..cfc8a96d 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackedChar.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTPackedChar.java
@@ -67,7 +67,7 @@ public sealed class STBTTPackedChar extends Struct {
         xoff2 = LAYOUT.varHandle(PathElement.groupElement("xoff2")),
         yoff2 = LAYOUT.varHandle(PathElement.groupElement("yoff2"));
 
-    public STBTTPackedChar(MemorySegment address, MemoryLayout layout) {
+    protected STBTTPackedChar(MemorySegment address, MemoryLayout layout) {
         super(address, layout);
     }
 
@@ -75,6 +75,13 @@ public STBTTPackedChar(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public static Buffer create(SegmentAllocator allocator, long count) {
         return new Buffer(allocator.allocateArray(LAYOUT, count), count);
     }
diff --git a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTVertex.java b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTVertex.java
index b16bd20f..1a951946 100644
--- a/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTVertex.java
+++ b/modules/overrungl.stb/src/main/java/overrungl/stb/STBTTVertex.java
@@ -66,6 +66,13 @@ public STBTTVertex(MemorySegment address) {
         super(address, LAYOUT);
     }
 
+    /**
+     * {@return the elements size of this struct in bytes}
+     */
+    public static long sizeof() {
+        return LAYOUT.byteSize();
+    }
+
     public short x() {
         return (short) x.get(segment());
     }