diff --git a/agb-image-converter/src/lib.rs b/agb-image-converter/src/lib.rs
index c9c58898..1cd8356b 100644
--- a/agb-image-converter/src/lib.rs
+++ b/agb-image-converter/src/lib.rs
@@ -115,15 +115,17 @@ pub fn include_aseprite_inner(input: TokenStream) -> TokenStream {
 
         for frame in frames {
             let width = frame.width();
-            assert!(width == frame.height() && width.is_power_of_two() && width <= 64);
+            let height = frame.height();
+            assert!(
+                valid_sprite_size(width, height),
+                "File {} contains sprites with unrepresentable size {}x{}",
+                filename.display(),
+                width,
+                height
+            );
 
             let image = Image::load_from_dyn_image(frame);
-            add_to_optimiser(
-                &mut optimiser,
-                &image,
-                width as usize,
-                Some(transparent_colour),
-            );
+            add_to_optimiser(&mut optimiser, &image, 8, Some(transparent_colour));
             images.push(image);
         }
     }
@@ -293,7 +295,7 @@ fn palete_tile_data(
     let mut tile_data = Vec::new();
 
     for image in images {
-        let tile_size = image.height;
+        let tile_size = 8;
         let tiles_x = image.width / tile_size;
         let tiles_y = image.height / tile_size;
 
@@ -401,3 +403,21 @@ mod tests {
         assert_eq!(AnimationDirection::PingPong as usize, 2);
     }
 }
+
+fn valid_sprite_size(width: u32, height: u32) -> bool {
+    match (width, height) {
+        (8, 8) => true,
+        (16, 16) => true,
+        (32, 32) => true,
+        (64, 64) => true,
+        (16, 8) => true,
+        (32, 8) => true,
+        (32, 16) => true,
+        (64, 32) => true,
+        (8, 16) => true,
+        (8, 32) => true,
+        (16, 32) => true,
+        (32, 64) => true,
+        (_, _) => false,
+    }
+}
diff --git a/agb/examples/gfx/tall.aseprite b/agb/examples/gfx/tall.aseprite
new file mode 100644
index 00000000..532c264d
Binary files /dev/null and b/agb/examples/gfx/tall.aseprite differ
diff --git a/agb/examples/gfx/wide.aseprite b/agb/examples/gfx/wide.aseprite
new file mode 100644
index 00000000..c1bdd226
Binary files /dev/null and b/agb/examples/gfx/wide.aseprite differ
diff --git a/agb/examples/sprites.rs b/agb/examples/sprites.rs
index b0b5941b..0ae5ffb5 100644
--- a/agb/examples/sprites.rs
+++ b/agb/examples/sprites.rs
@@ -8,7 +8,9 @@ use alloc::vec::Vec;
 
 const GRAPHICS: &Graphics = agb::include_aseprite!(
     "examples/gfx/objects.aseprite",
-    "examples/gfx/boss.aseprite"
+    "examples/gfx/boss.aseprite",
+    "examples/gfx/wide.aseprite",
+    "examples/gfx/tall.aseprite"
 );
 const SPRITES: &[Sprite] = GRAPHICS.sprites();
 const TAG_MAP: &TagMap = GRAPHICS.tags();
@@ -102,6 +104,8 @@ fn main(mut gba: agb::Gba) -> ! {
 
     loop {
         all_tags(&gfx);
+        gfx.commit();
         all_sprites(&gfx);
+        gfx.commit();
     }
 }
diff --git a/agb/src/display/object.rs b/agb/src/display/object.rs
index 09ab9275..3888a8af 100644
--- a/agb/src/display/object.rs
+++ b/agb/src/display/object.rs
@@ -163,9 +163,7 @@ macro_rules! align_bytes {
 
 /// Includes sprites found in the referenced aseprite files. Can include
 /// multiple at once and optimises palettes of all included in the single call
-/// together. Currently limited to square sprites that match a supported
-/// dimension of the GBA, see [Size] for supported sizes. Returns a reference to
-/// [Graphics].
+/// together. See [Size] for supported sizes. Returns a reference to [Graphics].
 ///
 /// ```rust,no_run
 /// # #![no_std]