diff --git a/src/file_data.rs b/src/file_data.rs
index 0a1a66f..2abd080 100644
--- a/src/file_data.rs
+++ b/src/file_data.rs
@@ -24,14 +24,21 @@ impl Raw {
         itype.widths(self.byte_count())
     }
 
+    pub fn heights(&self, itype: ImageType, width: usize) -> Vec<i64> {
+        itype.heights(self.byte_count(), width)
+    }
+
     pub fn parse(&self, parser: ParserType, width: usize) -> Image {
         Image(parser.process_input(&self.0, width))
     }
 
     pub fn previews(&self) -> Vec<Image> {
+        // if let Some(width) = width {
+        // }else {
         self.widths(ImageType::CGA)
             .iter()
             .map(|w| Image(ParserType::CGA.process_input(&self.0, *w as usize)))
             .collect()
+        // }
     }
 }
diff --git a/src/lib.rs b/src/lib.rs
index 900f3a4..646edbc 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -62,9 +62,17 @@ impl ImageType {
     }
 
     pub fn widths(&self, byte_count: usize) -> Vec<i64> {
-        factor(self.pixel_count(byte_count).try_into().unwrap())
+        Self::factors(self.pixel_count(byte_count), 80)
+    }
+
+    pub fn heights(&self, byte_count: usize, width: usize) -> Vec<i64> {
+        Self::factors(self.pixel_count(byte_count) / width, 50)
+    }
+
+    pub fn factors(num: usize, upper: usize) -> Vec<i64> {
+        factor(num.try_into().unwrap())
             .into_iter()
-            .filter(|&x| x > 4 && x < 80)
+            .filter(|&x| x >= 4 && x <= upper.try_into().unwrap())
             .collect()
     }
 }
diff --git a/src/wasm/image.rs b/src/wasm/image.rs
index bf85cc1..654eb1d 100644
--- a/src/wasm/image.rs
+++ b/src/wasm/image.rs
@@ -1,6 +1,6 @@
 use base64::{engine::general_purpose::STANDARD, Engine};
 
-use web_sys::{HtmlElement, HtmlInputElement};
+use web_sys::HtmlInputElement;
 use yew::{html, Callback, Component, Context, Event, Html, Properties, SubmitEvent, TargetCast};
 
 use crate::color::palette::palette_from_abbr;
@@ -57,7 +57,10 @@ impl ImageComponent {
                     let _ = png::write_to(&mut bytes, tile(p.data(), self.height), palette.clone());
                     let src = format!("data:application/png;base64,{}", STANDARD.encode(bytes));
                     html! {
-                        <img src={ src } />
+                        <span>
+                            {p.width()}
+                            <img src={ src } />
+                        </span>
                     }
                 })
                 .collect()